335 Type Slide Screw Lead Screw Rolled Ball Screw Precision Ball Screw Shape Features Simple feed and adjust mechanisms, etc. Made of stainless steel shaft and plastic nut. No-grease operation is possible. Optimal for the case where thrust loads and high loadings exist. Can be applied at reasonable costs when precision ball screw accuracies are not required. Optimal for the case where high positioning and velocity accuracy are required. App. Example Stoppers In/Out and Transfer pitch changeover Transfer pitch changeover Jacks, Feed Screw for Lathes Transfer Line Measurement Instruments Allowable Rotational Speed Low Speed Medium Speed High Speed High Speed Accuracy Allowable Axial Load ( ) is for Reference. (max540N) (max30000N) (max9960N) (max9960N) 2Feed Screw Comparison 2Lineup : Lead Screws Lead Screw Type Shape 3JHIU )BOE 5ISFBE -FGU )BOE 5ISFBE 'JOF 1JUDI 3JHIU )BOE 5ISFBE 3JHIU BOE -FGU )BOE 5ISFBE 1SFDJTJPO 3JHIU BOE -FGU )BOE 5ISFBE Both Ends Stepped _ _ _ _ _ One End Stepped / One End Double Stepped _ _ - _ _ One End Stepped / One End Double Stepped _ - - - - Both Ends Double Stepped _ _ - - - Straight _ _ - _ - 2Lead Screw Thread Geometry Standards (JIS Tr) P 15° 15° 30° H H/2 H/2 H 1 H1/2 d1 D1 or d2 D2 or Threaded d or D Tapped 2Lead Screw Accuracy Standards Item Content Allowable Dimension and Tolerance JISB0217 0218 Screw Accuracy 7e Grade Nut Accuracy 7H Grade Single Pitch Error ±0.02 Accumulated Pitch Error ±0.15/300mm Shaft Maximum Runout See table below Length Tolerance JIS B 0405 (Medium Class) H=1.866P H1=0.5P d2=d-0.5P d1=d-P D=d D2=d2 D1=d1 Thread d: O.D . d1: Root Dia. d2: Effective Dia. Tapped D: Root Dia. D1: I.D. d2: Effective Dia. P: Pitch H1: Engage Height & Pitch 3 of D Dimension 16, Pitch 5 of D Dimension 25 and Pitch 6 of D Dimension 40 conform to Tr Standard. (20) (20) D t Runout Measurement Method 2Lead Screw Specifications Shaft Dia. Pitch Screw Shaft Effective Dia. Screw Shaft Minor Dia. (MIN.) Screw Shaft Lead Angle Screw Shaft Runout (Max.) Shaft Overall Length ~125 126~200 201~315 315~400 401~500 501~630 631~800 801~1000 1001~1250 1251~1600 1601~2000 8 1.5 7.25 (5.9) 3°46' 0.1 0.14 0.21 0.27 0.35 - - - - - - 10 2 9 (7.2) 4°03' 0.09 0.12 0.16 0.21 0.27 0.35 0.46 0.58 12 2 11 (9.2) 3°19' 14 3 12.5 (10.1) 4°22' 0.09 0.11 0.13 0.16 0.2 0.25 0.32 0.42 - - - 16 2 15 (13.18) 2°25' 0.55 0.73 1 3 14.5 (12.1) 3°46' 18 4 16 (13.1) 4°33' - 20 2 19 (17.18) 1°55' 4 18 (15.1) 4°03' 22 5 19.5 (16.1) 4°40' - 0.09 0.11 0.13 0.16 0.19 0.23 0.3 0.38 0.5 0.69 25 5 22.5 (19) 4°03' 28 5 25.5 (22) 3°34' 32 6 29 (24.5) 3°46' 36 6 33 (28.5) 3°19' - 0.11 0.11 0.11 0.13 0.15 0.17 0.22 0.27 0.34 0.46 40 6 37 (32.5) 2°57' 50 8 46 (40.4) 3°10' Unit : mm Lead Screw Overview
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