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Product
Support Unit
For Ball screw

Korean made support unit, ball screw components, support unit varieties, support unit endblock, support block, support end block, end block for ball screw, ball screw end blocks , support block for ball screw, ball screw accessories, ISO 9001, ISO 14001, Korean made components, IT components, mechanical components, motion components, motion accessories, motion control, motion control components, semi conductor components, display machine components, small sized machine components, small mechanical components, machine components, factory automation part

Support unit for ball screw helps to support each shaft-ends of
ball screw. We, S.I.M provides diverse options according to sizes,
loads and purposes for our customers’ best convenience.

  • Support Unit for Ball Screw (Index)
  • Installation Guide
  • Made-To-Order
  • Motor Bracket Unit
  • General Load
  • High Load
  • Grease-injection Type
  • Other F.A. Components
    (Lock nut / Bearing unit)

Support Unit (General load)

Product Overview
  • Bearing Combinations and List of Bearings
  • Product Recommendation by Ball Screw Outer Diameters
  • Product Structure & How to order
  • Recommended Shape of Ball Screw Shaft-end

Bearing Combinations and List of Bearings

Bearing Combinations
  1. Arrangement types of angular contact ball bearing combinations
    1. DB combination (back to back): The large distance between the effective load centers results in higher rigidity at the moment load. However if accuracy of housing is not enough, it may produce damage e.g. flaking at a earlier stage due to the increased internal load. Preload is determined by torque when the user fastens the lock-nut.
    2. DF combination (face to face): The small distance between effective load centers limits bearing capacity to sustain moment load, however it performs at a better level to absorb the margin of assembly error. Preload is determined at maker’s assembly of bearing cover, thus this way allows easier self-management for users.
  2. Standard arrangement type of Sung-il products is DF combination.
    • In any case DB combination type is requested, please contact Sung-il Customer Service team for further assistance.
List of Bearings (Fixed Side)
Bearing Inner
dia.(mm)
Model Bearing
EK BK AK FK CK P5 C8 P0-C7
Ø4 EK-4 FK-4 AC-4-12-DF 634ZZ
Ø5 EK-5 FK-5 AC-5-14-DF 625ZZ
Ø6 EK-6 FK-6 706ATYNDFMP5 706ATYNDFC8 606ZZ
BK-6 EN-6
Ø8 EK-8 FK-8 CK-8 708ATYNDFMP5 708ATYNDFC8 EN-8/BA22-1
BK-8 EN-8/BA22-1
AK-8 708ATYNDFMP5
Ø10 EK-10 BK-10 AK-10 FK-10 CK-10 7000ATYNDFMP5 7000AWDFM 7000AW
Ø12 EK-12 BK-12 AK-12 FK-12 CK-12 7001ATYNDFMP5 7001AWDFM 7001AW
Ø15 EK-15 BK-15 AK-15 FK-15 CK-15 7002ATYNDFMP5 7002AWDFM 7002AW
Ø17 BK-17 FK-17 7203ATYNDFMP5 7203AWDFM 7203AW
Ø20 EK-20 AK-20 FK-20 7204ATYNDFMP5 7204AWDFM 7204AW
BK-20 7004ATYNDFMP5 7004AWDFM 7004AW
Ø25 EK-25 BK-25 FK-25 7205ATYNDFMP5 7205AWDFM 7205AW
Ø30 BK-30 FK-30 7206ATYNDFMP5 7206AWDFM 7206AW
Ø35 BK-35 FK-35 7207ATYNDFMP5 7207AWDFM 7207AW
Ø40 BK-40 FK-40 7208ATYNDFMP5 7208AWDFM 7208AW

※ The bearing brand may be subject to change with the same level products according to supplying conditions.

List of Bearings (Supported Side)
Bearing Inner
dia.(mm)
Model Bearing
EF BF AF FF CF
Ø6 EF-6/EF-8 BF-6/BF-8 AF-8 FF-6/FF-8 CF-8 606ZZ
Ø8 EF-10 BF-10 AF-10 FF-10 608ZZ
Ø10 EF-12 BF-12 AF-12 FF-12 CF-10/CF-12 6000ZZ
Ø15 EF-15 BF-15 AF-15 FF-15 CF-15 6002ZZ
Ø17 BF-17 FF-17 6203ZZ
Ø20 EF-20 AF-20 FF-20 6204ZZ
BF-20 6004ZZ
Ø25 EF-25 BF-25 FF-25 6205ZZ
Ø30 BF-30 FF-30 6206ZZ
Ø35 BF-35 FF-35 6207ZZ
Ø40 BF-40 FF-40 6208ZZ