Stopper bolts / non-positive / polyurethane rubber

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[Features] The urethane portion can absorb shocks. -Accuracy of a stop position can be easily achieved.

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Back to the Category Stopper Bolts

Technical Drawing - Stopper Bolts

Stop Pins/Press-Fit/Urethane:Related Image

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Available dimensions and tolerances can be found under the tab More Information.

Basic Properties (e.g., material, hardness, coating, tolerance) - Stopper Bolts

Type	Material	Hardness	Surface Treatment
USTMH	EN 1.7220 Equiv.	46~50HRC	Electroless Nickel Plating
USTMH	Urethane (Black)	Shore A90	-
USSTMH	EN 1.4037 Equiv.	50~55HRC	-
USSTMH	Urethane (Black)	Shore A90	-

Further specifications can be found under the tab More Information.

Composition of a Product Code - Stopper Bolts

Part Number

USTMH10
USTEH13

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Part Number
USSTMH5
USSTMH6
USSTMH8
USSTMH10
USSTMH12
USSTMH16
USSTMH18
USSTMH20

Standard Unit Price	Minimum order quantity	Volume Discount	Standard Shipping Days ?	RoHS	Tip O.D. (mm)	Material	Hardness
5.30 €	1	Available	Same day Stock	10	5	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC
5.82 €	1	Available	Same day Stock	10	6	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC
6.20 €	1	Available	5 Days	10	8	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC
6.33 €	1	Available	Same day Stock	10	10	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC
6.70 €	1	Available	Same day Stock	10	12	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC
7.09 €	1	Available	5 Days	10	16	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC
7.47 € 3.96 €	1	Available	Same day Stock	10	18	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC
7.84 €	1	Available	Same day Stock	10	20	[Stainless Steel] EN 1.4037 Equiv.	50 - 55HRC

Back to the Category Stopper Bolts

Technical Drawing - Stopper Bolts

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Specification Tables - Stopper Bolts

Part Number		dm₆		t	h	L	d₁	Collar for Press-Fitting	Unit Price
Type	D	dm₆		t	h	L	d₁	Collar for Press-Fitting	USTMH	USSTMH
USTMH USSTMH	5	3	+0.008 +0.002	1.5	0.7	5	3	NCLB3-6-10
	6	4	+0.012 +0.004		1.5	6	4	NCLB4-8-10
	8	5			1.5	8	6	NCLB5-10-10
	10	6		2.0	2.0	8	8	NCLB8-12-10
	12	8	+0.015 +0.006			10	10	NCLB10-16-10
	16	8				10	12	NCLB10-20-10
	18	10				12	13	NCLB12-20-10		-
	20	12	+0.018 +0.007			16	15	NCLB16-20-10

* Collar for press-fitting is not included.

General Information - Stopper Bolts

Stop bolt - stop bolt with thread - stop bolt with flat head - stop bolt round head - stop bolt with key hole - stop bolt with damper - stop bolt with rubber

Stop bolt selection details

- Material: steel, stainless steel

- Coatings: uncoated, nickel-plated

- Hardness: 32 to 55HRC

- Wrench width: 3 to 20 mm

- Head height: up to 50 mm

- Threads: M3 to M12

- Head diameter: 5 to 20 mm

- Diameter mounting side: 2 to 12 mm (m6)

- Brush head: polyurethane rubber (PUR) with Shore A90

Description/Basics

The stopper bolt from the group of stopper elements serves primarily as a stop in mechanical engineering (collision protection). In addition, it is increasingly used to determine the final position for workpieces and in movable applications in device construction (e.g., workpiece carriers).

In principle, MISUMI offers two mounting variants of the stop bolts. The commercially available variants are threaded stop bolts. Threaded stopper bolts have the advantage that they are easy to assemble and disassemble. Furthermore, the thread of the stop bolt can be used to adjust the spacing and the end position.
In addition, MISUMI offers non-threaded stop bolts for pressing in with fit tolerance as a further assembly variant. These stop bolts can also be inserted into the component to be moved in the event of frequent collisions to protect the component. In order to strengthen the component protection, the different designs of the stop bolts can also be combined with one another.
The undercuts at the transition from the shaft to the head ensures that in the event of impact energy can be transferred to the support surface over as large an area as possible.

As a rule, stop bolts have a flat contact surface. Correct alignment is necessary so that the entire contact surface can be used. If exact alignment is not possible, MISUMI also offers stop bolts with a spherical contact surface.
Both variants of stop bolts are protected from increased wear or damage with a hardened (tempered) contact surface. A low-wear stop bolt is necessary, especially with high cycles and frequent collisions. The stop bolts are also available with a cushioned contact surface made of polyurethane rubber. These can reduce the shock impulse, vibrations and associated noise.

If there is only a limited installation space, MISUMI offers the special form with a key hole on the head side. This facilitates the adjustment and installation of the stop bolt even when access is difficult.

Threaded stopper blocks are suitable for fastening stop bolts that have a configurable height.

Alternatively, MISUMI offers a large number of stopper bolts with brush heads and dampers, which, contrary to the stop bolt, have primarily damping properties.
If component guidance is required in addition to rigid and precise positioning, a height adjusting pin with a collar can serve as a guided stopper.

Application examples

Stopper block for stop bolt - hardened stop bolt - tempered stop bolt - holder stop bolt - end stop bolt

Application example – end stop with threaded stop bolt
(1) Adjustable shock absorber, (2) Stop bolts, (3) Threaded Stopper Block

Application example: workpiece carrier with stop bolt with plastic brush head - tray with stop bolt with plastic brush head - stopper of workpiece carrier and stop bolt with rubber

Application example – workpiece carrier with stop bolt
(1) Stop bolt with rubber, (2) ฺBelt conveyor, (3) Workpiece carrier

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Basic information

Mounting Method	Press Fit	Tip Shape	With Urethane	Hardness (Urethane Part)	Shore A90

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Basic Attributes

Tip O.D.(mm)
5

6

8

10

12

16

18

20
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Hardness
- 46 - 50HRC
- 50 - 55HRC
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Type
- USSTMH
- USTMH
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Material
- Steel
  - EN 1.7220 Equiv.
- Stainless Steel
  - EN 1.4037 Equiv.
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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:
Can stopper bolts catch lateral impacts?: Answer:
Not all stop bolts are suitable for lateral impact. Most stop bolts have an external hex for assembly. This may damage the surface of the components to be stopped due to its edges. We recommend stopper blocks as the side stoppers. MISUMI offers them in a wide variety of materials such as metal, plastic and rubber.
Question:
Why is the stopper bolt coloured?: Answer:
The stop bolt is dyed on one side, since the usable area was hardened by a tempering process. This should make the stop bolt more resistant to wear. Accordingly, this is not a colouring or painting, but a tempering colour that is created in metals by heating.
Question:
Where can the stopper bolt be installed?: Answer:
MISUMI offers suitable threaded stopper blocks for the fastening of stop bolts. The blocks can be mounted on a base plate and the stop bolts can be screwed into it.
Question:
How resistant are the stopper bolts with dampers?: Answer:
The stop bolts with polyurethane (PUR) are abrasion-resistant and have a high mechanical strength. Further properties and stabilities can be found in the PDF Properties of Polyurethane.

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