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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 (Grease injection)download

Structure
BK-G
FK-G
SWBK-G
  • Advance design with a nipple being attached and a passage carved on the bearing cover for a easier grease refill
  • Prevention of foreign material and leak of grease by the inner oil-seal rings
  • Accompanied by a high accuracy lock-nut and collars(spacer)
Features of BK-G, FK-G & SWBK-G Series
  • Easy and Simple Grease Injection : This structure does not require the mounted Support unit to be detached from the ball screw and grease can be simply injected through the nipple on the body.
  • Enhanced Lubrication Performance & Reduced Bearing Friction : In terms that it is possible to frequently refill grease, it helps to reduce friction/abrasion of bearing and eventually extends the lifespan.
  • When a Support unit is mounted at a volatile circumstance or used with vertical drive motors, grease usually gets disappeared and lubrication of bearing doesn’t run smoothly. Thus, this Grease injection-type Support Unit series lets you refill grease easily and solves this issue.
How To Inject(Refill) Grease
  • With the support unit installed, slowly rotate the ball screw and gradually inject grease through the grease nipple.
  • Please refer to the table below for the recommended amount of grease to be injected.
  • Adjust the actual injection amount according to the operating conditions and grease injection cycle of the equipment.
  • Be cautious not to inject grease rapidly or in excessive quantities, as it may cause the oil seal to dislocate from its proper position.
Recommended Amount of Grease
Bearing
Model
Support Unit
Model
Recommended amount of grease (g)
Double-row(DF/DB) Triple-row(DFD) Four-row(DFF)
7203AW BK-17-G 4 - -
FK-17-G
7004AW BK-20-G 4 - -
7204AW FK-20-G 4 - -
7205AW BK-25-G 4 - -
FK-25-G
7206AW BK-30-G 6 - -
FK-30-G
7208AW BK-40-G 8 - -
FK-40-G
17TAC 47C SWBK-17-G 4 6 -
20TAC 47C SWBK-20-G 4 6 -
25TAC 62C SWBK-25-G 4 6 -
30TAC 62C SWBK-30-G 4 6 -
35TAC 72C SWBK-35-G 4 6 8
40TAC 72C SWBK-40-G 4 6 8
50TAC 100C SWBK-50-G 4 6 8
How to Order
Model-Precision grade mark-Surface Treatment

Precision
grade
mark
Mark Bearing precision grade Preload
P5 P5 Medium
C8 General Medium
P0-C7 General Light

Surface
Treatment
Mark Surface Treatment
No mark Black Oxide
RA Low temperature Black
Chrome Plating (Raydent)
List of bearings
Bearing Inner
dia. (mm)
Model Bearing
BK-G FK-G SWBK-G P5 C8 P0-C7 TAC(SWBK-G)
17 BK-17-G FK-17-G SWBK-17-G 7203ATYNDFMP5 7203AWDFM 7203AW 17TAC 47C
20 FK-20-G SWBK20-G 7204ATYNDFMP5 7204AWDFM 7204AW 20TAC 47C
BK-20-G 7004ATYNDFMP5 7004AWDFM 7004AW
25 BK-25-G FK-25-G SWBK-25-G 7205ATYNDFMP5 7205AWDFM 7205AW 25TAC 62C
30 BK-30-G FK-30-G SWBK-30-G 7206ATYNDFMP5 7206AWDFM 7206AW 30TAC 62C
35 BK-35-G FK-35-G SWBK-35-G 7207ATYNDFMP5 7207AWDFM 7207AW 35TAC 72C
40 BK-40-G FK-40-G SWBK-40-G 7208ATYNDFMP5 7208AWDFM 7208AW 40TAC 72C
Recommended Shape of Ball Screw Shaft-End (Fixed Side / General Load)
Drawing
Demensions(mm) Lock-nut
d A BK FK Model Size
M x pitch
Model E S Model F S
Ø25 - Ø28 17 BK-17-G 65 17 FK-17-G 67 17 RN-17 M17 x 1.0
20 BK-20-G 65 17 FK-20-G 73 17 RN-20 M20 x 1.0
Ø30 - Ø36 25 BK-25-G 80 20 FK-25-G 86 20 RN-25 M25 x 1.5
Ø40 30 BK-30-G 87 25 FK-30-G 87 25 RN-30 M30 x 1.5
Ø45 35 BK-35-G 93 28 FK-35-G 93 28 RN-35 M35 x 1.5
Ø50 - Ø55 40 BK-40-G 114 35 FK-40-G 114 35 RN-40 M40 x 1.5
Recommended Shape of Ball Screw Shaft-End (Fixed Side / High Load)
Drawing
Dimensions(mm) Lock-nut
d A SWBK Model Size
M x pitch
Model E S
Ø25 - Ø28 17 SWBK-17-G DF 93 23 HLRN-17 M17 x 1.0
DFD 108
20 SWBK-20-G DF 93 23 HLRN-20 M20 x 1.0
DFD 108
Ø30 - Ø36 25 SWBK-25-G DF 98 26 HLRN-25 M25 x 1.5
DFD 113
Ø40 30 SWBK-30-G DF 98 26 HLRN-30 M30 x 1.5
DFD 113
Ø45 35 SWBK-35-G DF 101 28 HLRN-35 M35 x 1.5
DFD 116
DFF 131
Ø50 - Ø55 40 SWBK-40-G DF 106 30 HLRN-40 M40 x 1.5
DFD 121
DFF 136
Ø63 - Ø70 50 SWBK-50-G DF 124 34 HLRN-50 M50 x 1.5
DFD 144
DFF 164