Linear shafts / stepped on one side / external thread / internal thread / conical (Part Numbers - CAD Download)

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(i)Remark

SFTF has been localized according to European needs and requirements. Please have a look on the EU version SFTFEU. SFTFEU is available in EN 1.1213 (Cf53) and h6 / h7.

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Technical Information

Tapped Type

Threaded Type

Stepped and Tapped Type
Shaft - One End Tapered, One End Tapped / One End Stepped and Tapped / One End Threaded: Related Image

[ ! ] For plated products, the surface roughness of D part is Shaft - Tapped With 2-Hole: Related Image

; and for unplated products, it is Shaft - Tapped With 2-Hole: Related Image

.
[ ! ] The dimension tolerances for L and F conform to JIS B 0405 Class m.
[ ! ] Annealing may lower hardness at shaft end machined areas (effective thread length + approx. 10 mm).
[ ! ] Annealing lowers the surface hardness in the range of J + 10 from the end.
[ ! ] Case hardening and plating layers do not remain on the tapered area.

Type									[M] Material	[H] Hardness	[S]Surface Treatment
One End Tapered, One End Tapped			One End Tapered, One End Stepped and Tapped			One End Tapered, One End Threaded
D Tolerance g6	D Tolerance h5	D Tol. f8	D Tolerance g6	D Tolerance h5	D Tol. f8	D Tolerance g6	D Tolerance h5	D Tol. f8
SFTF	SFLU	—	SFTG	SFJU	—	SFTN	SFKU	—	EN 1.3505 Equiv.	Induction Hardening EN 1.3505 Equiv. 58 HRC or more EN 1.4125 Equiv. or 13Cr Stainless Steel 56 HRC or more	—
SSFTF	SSFLU	—	SSFTG	SSFJU	—	SSFTN	SSFKU	—	EN 1.4125 Equiv. or 13Cr Stainless Steel		—
PSFTF	PSFLU	—	PSFTG	PSFJU	—	PSFTN	PSFKU	—	EN 1.3505 Equiv.		Hard Chrome Plating Plating Hardness: HV750 or more Plating Thickness: 5 μ or more
PSSFTF	PSSFLU	—	PSSFTG	PSSFJU	—	PSSFTN	PSSFKU	—	EN 1.4125 Equiv. or 13Cr Stainless Steel
RSFTF	—	—	RSFTG	—	—	RSFTN	—	—	EN 1.3505 Equiv.		Low Temperature Black Chrome Plating
RSSFTF	—	—	RSSFTG	—	—	RSSFTN	—	—	EN 1.4125 Equiv. or 13Cr Stainless Steel		Low Temperature Black Chrome Plating
—	—	PSGTF	—	—	PSGTG	—	—	PSGTN	EN 1.1191 Equiv.	—	Hard Chrome Plating Plating Hardness: HV750 or more Plating Thickness: 10 µ or more
—	—	PSSGTF	—	—	PSSGTG	—	—	PSSGTN	EN 1.4301 Equiv.	—

[!] Low temperature black chrome plated products made of EN 1.4125 Equiv. or 13Cr Stainless Steel have identification grooves.

Specification Table

○ One End Tapered, One End Tapped

Part Number	—	L	—	J	—	M
SFTF20	—	350	—	J15	—	M6
SF−SSFTF20	—	350	—	J15	—	M6

○ One End Tapered, One End Stepped and Tapped

Part Number	—	L	—	F	—	P	—	J	—	M
SFTG20	—	350	—	F25	—	P16	—	J10	—	M8

○ One End Tapered, One End Threaded

Part Number	—	L	—	F	—	B	—	P	—	J
SFTN20	—	350	—	F40	—	B30	—	P10	—	J10

■One End Tapered, One End Tapped

Part Number				1 mm Increments		M (Coarse) Selection											C
Type			D	L	J	M (Coarse) Selection											C
D Tolerance g6 SFTF SSFTF PSFTF PSSFTF RSFTF RSSFTF	D Tolerance h5 SFLU SSFLU PSFLU PSSFLU	D Tol. f8 PSGTF PSSGTF	6	25 to 900	5 to 7	3											0.5 or Less
			8	25 to 1100	5 to 10	3	4	5
			10	30 to 1200	5 to 14	3	4	5	6
			12	40 to 1400	5 to 18	(3)	4	5	6	8
			13	40 to 1400	5 to 20		4	5	6	8
			15	50 to 1400	10 to 24		4	5	6	8
			16	50 to 1400	10 to 25		4	5	6	8	10
			18	60 to 1400	10 to 28		4	5	6	8	10	12
			20	60 to 1400	10 to 32		4	5	6	8	10	12					1.0 or less
			25	75 to 1400	10 to 40		4	5	6	8	10	12	16
			30	85 to 1500	15 to 48				6	8	10	12	16	20
			35	90 to 1500	15 to 56					8	10	12	16	20	24
[ ! ] For low temperature black chrome plated products, D ≤ 30, L ≤ 1,000.			40	100 to 1500	20 to 64						10	12	16	20	24	30
			50	115 to 1500	20 to 80							12	16	20	24	30

[!] M () dimension is only available for D Tolerance g6. [!] L requires L - J ≥ 20.

■One End Tapered, One End Stepped and Tapped

Part Number				1 mm Increments				M (Coarse) Selection											(Y) Max.	R	C
Type			D	L	F	P	J	M (Coarse) Selection											(Y) Max.	R	C
D Tolerance g6 SFTG SSFTG PSFTG PSSFTG RSFTG RSSFTG	D Tolerance h5 SFJU SSFJU PSFJU PSSFJU	D Tol. f8 PSGTG PSSGTG	8	25 to 1098	2 ≤ F ≤ P × 5	6	5 to 10	3											1100	0.3 or Less	0.5 or Less
			10	30 to 1198		6 to 8	5 to 14	3	4	5									1200
			12	40 to 1398		6 to 10	5 to 18	3	4	5	6								1400
			13	40 to 1398		6 to 11	5 to 20	3	4	5	6	8							1400
			15	50 to 1398		6 to 13	10 to 24	3	4	5	6	8	10						1400
			16	50 to 1398		6 to 14	10 to 25	3	4	5	6	8	10						1400
			18	60 to 1398		7 to 16	10 to 28		4	5	6	8	10	12					1400
			20	60 to 1398		7 to 17	10 to 32		4	5	6	8	10	12					1400		1.0 or less
			25	75 to 1398		7 to 22	10 to 40		4	5	6	8	10	12	16				1400
			30	85 to 1498		8 to 27	15 to 48			5	6	8	10	12	16	20			1500
			35	90 to 1498	2 ≤ F ≤ P × 4	9 to 32	15 to 56			5	6	8	10	12	16	20	24		1500
[ ! ] For low temperature black chrome plated products, D ≤ 30, Y ≤ 1,000.			40	100 to 1498		11 to 37	20 to 64				6	8	10	12	16	20	24	30	1500
			50	115 to 1498		11 to 47	20 to 80				6	8	10	12	16	20	24	30	1500

[!] P dimensions require M + 3 ≤ P. [!]L requires L - J ≥ 20.

■One End Tapered, One End Threaded

Part Number				1 mm Increments			P (Coarse) Selection											1 mm Increments	(Y) Max.	R	C
Type			D	L	F	B	P (Coarse) Selection											J	(Y) Max.	R	C
D Tolerance g6 SFTN SSFTN PSFTN PSSFTN RSFTN RSSFTN	D Tolerance h5 SFKU SSFKU PSFKU PSSFKU	D Tol. f8 PSGTN PSSGTN	6	25 to 898	2 ≤ F ≤ P × 5	B ≤ F−2 (When P ≤ 6) B ≤ F−3 (When P = 8, 10) B ≤ F−5 (When P ≥ 12) B = 0 (W/o Threads)	3	4	5	6								5 to 10	900	0.3 or Less	0.5 or Less
			8	25 to 1098			3	4	5	6	8							5 to 10	1100
			10	30 to 1198			3	4	5	6	8	10						5 to 14	1200
			12	40 to 1398			3	4	5	6	8	10	12					5 to 18	1400
			13	40 to 1398				4	5	6	8	10	12					5 to 20	1400
			15	50 to 1398				4	5	6	8	10	12					10 to 24	1400
			16	50 to 1398				4	5	6	8	10	12	16				10 to 25	1400
			18	60 to 1398					5	6	8	10	12	16				10 to 28	1400
			20	60 to 1398					5	6	8	10	12	16	20			10 to 32	1400		1.0 or less
			25	75 to 1398						6	8	10	12	16	20	24		10 to 40	1400
			30	85 to 1498							8	10	12	16	20	24		15 to 48	1500
			35	90 to 1498								10	12	16	20	24	30	15 to 56	1500
[ ! ] For low temperature black chrome plated products, D ≤ 30, Y ≤ 500.			40	100 to 1498									12	16	20	24	30	20 to 64	1500
			50	115 to 1498										16	20	24	30	20 to 80	1500

[!] When D = P, specify F = B as B dimensions. However, since L and F dimensions have priority, B dimensions of the product should be F - (Pitch × 2).
[!] Thread machining will not be applied when B = 0 is specified. [!] L requires L - J ≥ 20. [!] B ≥ Pitch × 3 is required.

Alteration Details

·See below for alteration.
* When selecting multiple alterations, the distance between machined areas should be 2 mm or more.
* Alteration may lower hardness.

Alteration Code

Alteration Details

Fixed Dimension

Applicable Conditions

Ordering Example

LKC

Precisely change L dimension and tolerance

Shaft - One End Tapered, One End Tapped / One End Stepped and Tapped / One End Threaded: Related Image

·L < 200→L±0.03
·200 ≤ L < 500→L±0.05
·L ≥ 500→L±0.1

[ ! ]L Dimension can be specified in 0.1 mm increments

[NG]Not applicable to D = P
[NG]Not applicable to One End Stepped and Tapped, One End Threaded

SFTF20-350.5-J15-M6-LKC

Wrench Flat at One Location

M Side

Shaft - One End Tapered, One End Tapped / One End Stepped and Tapped / One End Threaded: Related Image

D	W	ℓ1	D	W	ℓ1
6	5	8	18	16	10
8	7		20	17
10	8		25	22
12	10	10	30	7	15
13	11		35	30	15
15	13		40	36	20
16	14		50	41	20

[ ! ]Applicable to D = 6 or more
[ ! ]SC = 1 mm Increments
[ ! ]SC + ℓ1 ≤ L - J
[ ! ]SC ≥ 0

SFTG20-350-F25-P16-J10-M8-SC5

Change Taper Angle at the Tip
Shaft - One End Tapered, One End Tapped / One End Stepped and Tapped / One End Threaded: Related Image

Specified Angle: 5° 10° 20° 25° 30°

[ ! ]D-Jtan (AC°) × 2 ≥ 2
requires L - J ≥ 20.

SFTG20-350-F25-P16-J10-M8-AC5

Circularity (M), Straightness (K), L Dimension Tolerance, Perpendicularity

■Straightness Measurement Method

Shaft ends are supported on V-blocks and turned 360 degrees to
measure shaft runout using a dial indicator.
1/2 of measured runout is defined as the straightness.

■Circularity M
Shaft Outer Dia. g6·h5 (Hardening)

D		Circularity M
Over	or Less	Circularity M
5	13	0.004
13	20	0.005

Unit: mm

■Straightness K
Shaft Outer Dia. g6·h5 (Hardening)

D	L		Straightness K
6 to 20	L ≤ 100		0.01 or Less
6 to 20	L > 100		(L/100) × 0.01 or Less

Unit: mm

■L Dimension Tolerance
Shaft Outer Dia. g6·h5 (Hardening)

L		L Dimension Tolerance
Over	or Less	L Dimension Tolerance
24	30	±0.2
30	120	±0.3
120	400	±0.5
400	1000	±0.8
1000	1400	±1.2

Unit: mm

■ Concentricity and Perpendicularity

Notes on Hardening and Surface Treating

■Reduced Hardness around Machined Areas

·Although processing is performed after the base material is hardened, annealing may lower hardness of the machined area.
* Reduced Hardness: Approximately 10 to 40 HRC

■Reduced Hardness Range

·Approximately 10 mm from the machined area

(Example)

■Machining area where hardness has lowered due to annealing

·Threaded, Stepped, Tapered, Wrench Flats

■Reduced Hardness Condition of Tapped

The conditions for lower hardness for tapped differ depending on the material and selection conditions.

EN 1.4125 Equiv. or 13Cr Stainless Steel: The hardness of the tapped part will decrease.
EN 1.3505 Equiv.: Under the following conditions, the hardness of the tapped will decrease.
·When M ≥ D/2, · RC thread, · One End Two Tapped Holes

■Effective Hardened Layer Depth of Hardening

The effective hardened layer depth varies depending on the external dimensions and materials.

O.D. D	Effective Hardened Layer Depth
	EN 1.3505 Equiv.	EN 1.4125 Equiv. or 13Cr Stainless Steel
	EN 1.3505 Equiv.	EN 1.4125 Equiv. or 13Cr Stainless Steel
6 to 10	0.5 or More	0.5 or More
12·13	0.7 or More	0.5 or More
15 to 20	0.7 or More	0.7 or More

■About hard chrome plating and plating layer of processed part

Hard chrome plating is applied after surface treatment of the base material, so there is no plating on the processed parts.
In the example below, only "///" area is treated with hard chrome plating.

Ex. Plating Remains: Stepped, Threaded Shaft, Set Screw Flat

/// Part: Plating Remains

Difference Between Shaft and Rotary Shaft

■ Basic Specifications

Specifications	Shafts		Rotary Shaft
Material	EN 1.3505 Equiv. EN 1.4125 Equiv. or 13Cr Stainless Steel	EN 1.1191 Equiv. EN 1.4301 Equiv.	EN 1.1191 Equiv. EN 1.4301 Equiv.	EN 1.7220 Equiv.
Hardening	Induction Hardened	—	—	Hardness: 30 to 35 HRC
O.D. Tolerance	g6/h5	f8	g6/h9/h7	g6
Surface Treatment	No Plating Hard Chrome Plating Low Temperature Black Chrome Plating Electroless Nickel Plating (Surface Treatment Fully Plated Type)	Hard Chrome Plating	No Plating Black Oxide Electroless Nickel Plating	Black Oxide Electroless Nickel Plating

* Hard chrome plating leaves no plating layer on the machined part.

■ Alteration

Alterations	Shafts	Rotary Shaft
L Dimension Tolerance	L < 200⇒L±0.03 200 ≤ L < 500⇒L±0.05 L ≥ 500⇒L±0.1	L < 500⇒L±0.05 L ≥ 500⇒L±0.1 Not applicable when L ≥ 800
Wrench Flats	Can be specified up to 2 Locations	Can be specified up to 1 Location
Set Screw Flat	Can be specified up to 2 Locations	Can be specified up to 3 Locations
2 Set Screw Flats	Can be specified up to 2 Locations Angle Specified: Fixed	Can be specified up to 1 Location Angle Specified: Configurable in 15 degree Increments
V Groove	Can be specified up to 2 Locations	—
Keyway	Can be specified up to 2 Locations Processing of Stepped Part: Not Possible	Can be specified up to 4 Locations Processing of Stepped Part: Possible
Undercut	M6 to M30	M3 to M30
Tapped Depth	Possible	Possible
Retaining Ring Groove	Can be specified 2 Locations (It will be a retaining ring type instead of alterations)	2 locations on D part, 1 location each on stepped part can be combined
Slit Cam Groove	—	Can be specified up to 1 Location
Concentricity	—	Possible
Left-hand Thread / Thread	—	Possible
Slit Added	—	Can be specified up to 1 Location
C Chamfering Width	—	Possible

Surface Limits / Hardness - Linear Shafts

Limits of hardness and hardening depth

The linear shafts are processed after the base material has undergone inductive hardening. Therefore, the processed surfaces may result in a deviating hardness.
In the following example, you can view the affected areas of the linear shaft, which may be affected after processing by e.g. threads, level surfaces, key surfaces and transverse bores.

Limitation of linear shaft induction hardening

Cause for deviating hardness

The raw material of the linear shaft is treated via thermal induction before grinding. Thus, a configured linear shaft can be custom-made not only cost-effectively, but also with short delivery times. The linear shaft is hardened at the boundary layer (boundary layer hardening) of the liner shaft. The depth of the hardened boundary layer depends on the material used and the diameter of the linear shaft. The following table shows the hardening depth of linear shafts.
Coatings and plating are applied to the raw material after hardening and grinding. For more information, see Coatings of the Linear Shaft.

Boundary layer hardening of a linear shaft

Figure of boundary layer hardening: hardened boundary layer in light gray

Effective hardening depth of linear shafts

Outside diameter (D)	Effective hardening depth
	EN 1.1191 equiv.	EN 1.3505 equiv.	EN 1.4125 equiv.	EN 1.4301 equiv.
3	-	+0.5	+0.5	Without induction hardening
4	-
5	-
6 - 10	+0.3
12 - 13	+0.5	+0.7	+0.5
15 - 20			+0.7
25 - 50	+0.8	+1

Overview of the effective hardening depth as PDF

Coatings of the linear shaft

The surface coating is applied to the raw material before machining the linear shaft. Thanks to their coating, the usable surface or work surface of the linear shaft is not only protected against corrosion but also against wear.
Machined positions of the linear shafts, such as plane surfaces or threads, may be uncoated, as they are added afterwards. This can lead to the machined surfaces being corroded in a linear shaft made of steel. If the linear shaft is used in a corrosive environment, it is recommended to use a stainless steel linear shaft.
The following figure shows the areas of the linear shaft that are coated (crosshatched).

Surface coating after processing the linear shaft

Figure: Coating of linear shafts

You can find further information on surface treatment and hardness in this PDF .

General Information - Linear Shafts

Linear Shaft Selection Details

- Material: steel, stainless steel

- Coating/plating: uncoated, hard chrome plated, LTBC coated, chemically nickel-plated

- Heat treatment: untreated, inductively hardened

- ISO tolerances: h5, k5, g6, h6, h7, f8

- Precision classes: perpendicularity 0.03, concentricity (with thread and increments) Ø0.02, perpendicularity 0.20, concentricity (thread and stepper) Ø0.10

- Linearity/roundness: depends on diameter, here for the PDF

Description / basics of the linear shaft

Linear shafts are steel shafts that perform guiding tasks in combination with linear bearings, such as plain bearing bushings or linear ball bushings. Linear shaft holding functions can be adopted from shaft holders or linear ball bearing adapters. Most linear shafts are heat-treated (induction hardened) solid shafts. A special design of linear shafts is the hollow shaft, which is also called tubular shaft. Inductively hardened linear shafts have a high surface hardness and a tough core. The achievable surface hardness is approx. 55-58 HRC (see information on hardening depth). Linear shafts made of stainless steels can generally not be hardened. Therefore, these steel shafts should be chrome plated to protect them from wear.

Materials

Linear shafts are mainly hardened steel shafts. In addition to the selected heat treatment, the steel used in particular imparts its properties to the linear shaft, although it is a hollow shaft or a solid shaft. Therefore, special aspects such as hardness, corrosion and wear must be considered when selecting the shaft steel.

Coatings

To protect linear shafts from corrosion, the surface can be chemically nickel-plated. As an alternative to chemical nickel-plating, steel shafts can also be coated with LTBC. The LTBC coating is an anti-corrosive surface coating and it is a low-reflection coating, made of a 5 μm thick film of fluoropolymer, which in essence is a black film. In addition, the LTBC coating is resistant to bursting pressure by extreme or repeated bending. LTBC-coated linear shafts are thus particularly suitable for locations where corrosion or light reflections are undesirable. Linear shafts that require particularly high surface hardness and wear resistance can be hard chrome plated.

Function

The form and function of linear shafts differ from linear guiderails. Linear guiderails are square rails that work in combination with carriers (rotary elements, carriages) according to the rolling or sliding principle. Linear shafts on the other hand are precision-ground round steel shafts that take on a linear guide function in conjunction with linear ball bushings or plain bearing bushings (maintenance-free bushings).

Areas of Application

Linear shafts are intended for axial motion. Whether horizontal or vertical linear motion, all linear motions can be implemented with linear shafts. Common applications are stroke mechanisms and other applications with high demands on smoothness, precision and service life. Linear shafts can therefore be used in almost all industries of plant construction and mechanical engineering. Linear shafts are often found in 3D printers, metering equipment, measuring devices, positioning devices, alignment devices, bending devices and sorting equipment.

Instructions for Use / Installation - Linear Shafts

For product selection, please observe the linear shaft tolerances (e.g. h5, k5, g6, h6, h7, f8) in conjunction with the diameter tolerance of the plain bearing bushing (sliding bearing) after pressing in or the running circle diameter of the linear ball bearing (ball bushing).

Diameter change of linear ball bushings after pressing

Inner diameter of linear ball bushings or ball bushings

Shaft Fasteners

Application Example of a Linear Shaft - Linear Shafts with Linear Ball Bushings - Linear Shafts with Shaft Holder

Application Example of a Linear Shaft Application Example - Linear Shaft with Linear Ball Bearings - Linear Ball Bearings with an Adjusting Ring

Application Example of a Linear Shaft - Linear Shaft with Shaft Holder

Application Example of a Linear Shaft - Linear Shaft with Circlip Groove - Linear Shaft with Circlip

Application Example of a Linear Shaft - Linear Shaft with Holding Washer

Application Example of a Linear Shaft - Linear Thread - Outer Threaded Linear Shaft - Linear Threaded with inner and outer threads

Application Example of a Linear Shaft - Cross Bore Linear Shaft - Inner Thread Linear Shaft

Application Example of a Linear Shaft - Cross Bore Linear Shaft - Outer Thread Linear Shaft

Supplementary Article

Shaft holder

Adjusting rings/clamping rings

Product range of adjusting rings - product range of clamping rings

Linear ball bearing

Plain bearing bushings

Product range of sliding bearing bushings - plain bearing with housing

Ball guides

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Part Number
SFTG35-[90-1498/1]-F[2-128/1]-P[9-32/1]-J[15-56/1]-M[5,6,8,10,12,16,20,24]
SFTG40-[100-1498/1]-F[2-148/1]-P[11-37/1]-J[20-64/1]-M[6,8,10,12,16,20,24,30]
SFTG50-[115-1498/1]-F[2-188/1]-P[11-47/1]-J[20-80/1]-M[6,8,10,12,16,20,24,30]
SFTN6-[25-200/1]-F[2-42/1]-B[0-42/1]-P[3,4,5,6]-J[5-7/1]
SFTN8-[25-200/1]-F[2-56/1]-B[0-53/1]-P[3,4,5,6]-J[5-10/1]
SFTN10-[30-200/1]-F[2-70/1]-B[0-70/1]-P[4,5,6,8]-J[5-14/1]
SFTN12-[40-300/1]-F[2-84/1]-B[0-79/1]-P[5,6,8,10]-J[5-18/1]
SFTN13-[40-300/1]-F[2-84/1]-B[0-79/1]-P[5,6,8,10]-J[5-20/1]
SFTN15-[50-300/1]-F[2-84/1]-B[0-79/1]-P[5,6,8,10]-J[10-52/1]
SFTN16-[50-500/1]-F[2-112/1]-B[0-107/1]-P[5,6,8,10,12,16]-J[10-25/1]
SFTN18-[60-500/1]-F[2-112/1]-B[0-107/1]-P[5,6,8,10,12,16]-J[10-28/1]
SFTN20-[60-500/1]-F[2-140/1]-B[0-135/1]-P[5,6,8,10,20]-J[10-32/1]
SFTN25-[75-1398/1]-F[2-120/1]-B[0-115/1]-P[6,8,10,12,16,20,24]-J[10-40/1]
SFTN30-[85-1498/1]-F[2-120/1]-B[0-115/1]-P[8,10,12,16,20,24]-J[15-48/1]
SFTN35-[90-1498/1]-F[2-150/1]-B[0-145/1]-P[10,12,16,20,24,30]-J[15-56/1]
SFTN40-[100-1498/1]-F[2-150/1]-B[0-145/1]-P[12,16,20,24,30]-J[20-64/1]
SFTN50-[115-1498/1]-F[2-150/1]-B[0-145/1]-P[16,20,24,30]-J[20-80/1]

Standard Unit Price	Minimum order quantity	Standard Shipping Days ?	RoHS	Basic Shape	Shaft end Shape (Right)	[D] Diameter (Shaft) (mm)	[L] Length (Shaft) (mm)	Material	Heat Treatment	Surface Treatment	ISO Tolerance	Hardness	[B] Length (thread) (mm)	[F] Length (stud - offset - front side) (mm)	[J] Size (thread) (mm)	[P] Diameter (stepped - front side) (mm)	[M] Size (thread - depth 2xM) (mm)
-	1	7 Days	-	Solid, One End Stepped	Internal thread	35	90 ～ 1498	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	-	2 ～ 128	15 ～ 56	9 ～ 32	5 ～ 24
-	1	7 Days	-	Solid, One End Stepped	Internal thread	40	100 ～ 1498	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	-	2 ～ 148	20 ～ 64	11 ～ 37	6 ～ 30
-	1	7 Days	-	Solid, One End Stepped	Internal thread	50	115 ～ 1498	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	-	2 ～ 188	20 ～ 80	11 ～ 47	6 ～ 30
-	1	4 Days	10	Solid	External thread	6	25 ～ 200	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 42	2 ～ 42	5 ～ 7	3 ～ 6	-
-	1	4 Days	10	Solid	External thread	8	25 ～ 200	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 53	2 ～ 56	5 ～ 10	3 ～ 6	-
-	1	4 Days	10	Solid	External thread	10	30 ～ 200	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 70	2 ～ 70	5 ～ 14	4 ～ 8	-
-	1	4 Days	10	Solid	External thread	12	40 ～ 300	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 79	2 ～ 84	5 ～ 18	5 ～ 10	-
-	1	4 Days	10	Solid	External thread	13	40 ～ 300	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 79	2 ～ 84	5 ～ 20	5 ～ 10	-
-	1	4 Days	10	Solid	External thread	15	50 ～ 300	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 79	2 ～ 84	10 ～ 52	5 ～ 10	-
-	1	4 Days	10	Solid	External thread	16	50 ～ 500	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 107	2 ～ 112	10 ～ 25	5 ～ 16	-
-	1	7 Days	10	Solid	External thread	18	60 ～ 500	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 107	2 ～ 112	10 ～ 28	5 ～ 16	-
-	1	4 Days	10	Solid	External thread	20	60 ～ 500	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 135	2 ～ 140	10 ～ 32	5 ～ 20	-
-	1	7 Days	-	Solid	External thread	25	75 ～ 1398	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 115	2 ～ 120	10 ～ 40	6 ～ 24	-
-	1	7 Days	-	Solid	External thread	30	85 ～ 1498	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 115	2 ～ 120	15 ～ 48	8 ～ 24	-
-	1	7 Days	-	Solid	External thread	35	90 ～ 1498	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 145	2 ～ 150	15 ～ 56	10 ～ 30	-
-	1	7 Days	-	Solid	External thread	40	100 ～ 1498	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 145	2 ～ 150	20 ～ 64	12 ～ 30	-
-	1	7 Days	-	Solid	External thread	50	115 ～ 1498	[Alloyed Steel] EN 1.3505 Equiv.	Induction Hardened	No Treatment	g6	Induction Hardened (58HRC or more)	0 ～ 145	2 ～ 150	20 ～ 80	16 ～ 30	-

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Basic information

RoHS Information	RoHS requirements fulfilled	Features, Areas of application	Not applicable	Shaft end Shape (Left)	Taper
Shaft end Perpendicularity	0.2

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Basic Attributes

Basic Shape
- Solid
- Solid, One End Stepped
Clear
Shaft end Shape (Right)
- Internal thread
- External thread
Clear
[D] Diameter (Shaft)(mm)
6

8

10

12

13

15

16

18

20

25

30

35

40

50
Clear
[L] Length (Shaft)(mm)
[25-1500/1mm Unit(s)]
Clear
Material
- Unalloyed Steel
  - EN 1.1191 Equiv.
- Stainless Steel (austenitic)
  - EN 1.4301 Equiv.
- Alloyed Steel
  - EN 1.3505 Equiv.
- Stainless Steel (martensitique)
  - EN 1.4125 Equiv.
Clear
Heat Treatment
- No Treatment
- Induction Hardened
Clear
Surface Treatment
- No Treatment
- Hard Chrome Plating
- LTBC Plating
Clear
ISO Tolerance
f8

g6

h5
Clear
Hardness
- Induction Hardened (56HRC or more)
- Induction Hardened (58HRC or more)
- Not induction hardened
Clear
[B] Length (thread)(mm)
[0-145/1mm Unit(s)]
Clear
[F] Length (stud - offset - front side)(mm)
[2-188/1mm Unit(s)]
Clear
[J] Size (thread)(mm)
1

5

7
[5-80/1mm Unit(s)]
Clear
[P] Diameter (stepped - front side)(mm)
3

4

5

6

8

10

12

16

20

24

30
[6-47/1mm Unit(s)]
Clear
[M] Size (thread - depth 2xM)(mm)
3

4

5

6

8

10

12

16

20

24

30
Clear
Type
- PSFJU
- PSFKU
- PSFLU
- PSFTF
- PSFTG
- PSFTN
- PSGTF
- PSGTG
- PSGTN
- PSSFJU
- PSSFKU
- PSSFLU
- PSSFTF
- PSSFTG
- PSSFTN
- PSSGTF
- PSSGTG
- PSSGTN
- RSFTF
- RSFTG
- RSFTN
- RSSFTF
- RSSFTG
- RSSFTN
- SFJU
- SFKU
- SFLU
- SFTF
- SFTG
- SFTN
- SSFJU
- SSFKU
- SSFLU
- SSFTF
- SSFTG
- SSFTN
Clear
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12 Days or Less
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently Asked Questions (FAQ)

Question:
What is the difference between a hollow shaft and a solid shaft?: Answer:
With the same size, there are three differences between a hollow shaft and a solid shaft. Hollow shafts weigh less. The inner cavity of a hollow shaft is suitable for use as a channel (cable channel). Solid shafts are a bit more rigid (higher resistance torque).
Question:
What is the minimum order of linear shafts from MISUMI?: Answer:
MISUMI supplies solid shafts, hollow shafts and precision shafts starting at a lot size of 1. This also applies to all other items in our product range.
Question:
Noises and vibrations occur with a linear shaft. In addition, there are jerky movements. What could cause this?: Answer:
In general, it may be caused if the steel shaft is not properly lubricated. In addition, an incorrectly selected diameter tolerance of the linear shafts may also make the cycle of motion more difficult. When using MISUMI linear ball bearings, a g6 shaft tolerance is recommended (tolerance recommendations may vary depending on the manufacturer).
Question:
What is the strength of a solid shaft?: Answer:
The strength of a linear shaft, although it is a solid shaft, hollow shaft or precision shaft, should always be selected in consideration of the strength of the material used.
Question:
What are the advantages of a hollow shaft over a solid shaft?: Answer:
There are various advantages of a hollow shaft compared to a solid shaft. If the outer diameter is the same, the weight of a hollow shaft is lower than that of a solid shaft. However, the cavity of the hollow shaft can also be used as a cable channel or for cooling. A hollow shaft is at the same weight or with the same cross-sectional area more rigid than a solid shaft, because the outer diameter is larger. However, the question that needs to be answered is whether the advantage is a greater room utilization or less weight.
Question:
Is a hollow shaft stiffer than a solid shaft?: Answer:
The rigidity of a hollow shaft is slightly lower with the same outer diameter than that of a solid shaft. However, with the same cross-sectional area or with the same weight, the stiffness of a hollow shaft is higher than that of a solid shaft, because the outer diameter of the hollow shaft is larger.
Question:
Why do I have running grooves on the linear shafts of my 3D printers?: Answer:
The running grooves on the linear shaft may have been created, for example, by using a linear ball bearing. To prevent grooves from forming on a steel shaft, it should be hardened and hard chromium plated, making it more durable and resistant to the wear and tear from ball bearings.
Question:
How do the flexure properties of hollow shafts and solid shafts differ?: Answer:
With an equally large outer diameter, a solid shaft has better flexure properties than an equally large hollow shaft. However, the solid shaft is not much stiffer than a hollow shaft with the same outer diameter, since the outer sections mainly carry the load. Hollow shafts with the same cross-sectional area are more rigid than solid shafts, because they have a larger outer diameter. Therefore, there is physically more material in the outer sections for the bending, which bears the loads.
Question:
I need a lacquered or matted shaft because reflections cause problems with the optics. Does MISUMI have something like that?: Answer:
MISUMI LTBC-coated linear shafts are an alternative to painted or matted steel shafts. The LTBC coating is low-reflection and has the same effect as painted and matte shafts. In addition, LTBC-coated linear shafts are more resistant to wear and tear and flaking. You can find further information on LTBC coating here .
Question:
It has been shown that a hollow shaft is stronger than a solid shaft made of the same material. Why?: Answer:
A hollow shaft with the same outer dimensions is principally not stronger than a solid shaft. However, a hollow shaft per weight unit is stronger.