Support Unit (High load)

Support Unit For Ball screw

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

Product Overview
Specification

SWBK Series (High-load)HBK Series (Ultra High-load)

Support Unit For Ball Screw (High Load) : SWBK Series

Structure

Bearing Combinations

Drawing of DF combination — DF Combinations

How to Order

① Bearing Combinations	Mark	Combinations
	DF	Double-row
	DFD	Triple-row
	DFF	Four-row

② Surface Treatment	Mark	Surface Treatment
	No mark	Black Oxide
	RA	Low temperature Black Chrome Plating (Raydent)

Grease Model	Standard	LG2	AFE-CA	AFF	HT-Z1	NBU-15	XL-600
Mark	No mark	AG	AE	AF	AH	AN	AX

※ For detailed information regarding grease replacement, please refer to the guideline pages in the catalogue under the “Made-To-Order Process.”

Support Unit For Ball Screw (High Load) : HBK Series

Features

This product can accommodate higher loads compared to the SWBK series.
Preload is determined by the fastening torque of the locknut; therefore, be sure to follow the recommended fastening torque.
Supplied as standard with a grease injection type.
The product comes with a locknut included.

Structure

Bearing Combinations

The wide contact surface of the cylindrical rollers supports both radial loads and partial axial loads, ensuring structural rigidity.
The cage precisely keeps the rollers evenly spaced. This reduces friction, heat generation, and noise, enabling stable rotation even under high-load and high-torque conditions.
The bearing is designed for direct grease injection, allowing long-term stable lubrication.

How to Order

① Surface Treatment	Mark	Surface Treatment
	No mark	Black Oxide
	RA	Low temperature Black Chrome Plating (Raydent)

Grease Model	Standard	LG2	AFE-CA	AFF	HT-Z1	NBU-15	XL-600
Mark	No mark	AG	AE	AF	AH	AN	AX

※ For detailed information regarding grease replacement, please refer to the guideline pages in the catalogue under the “Made-To-Order Process.”

Support Unit For Ball Screw (High Load) – Specification

SWBK Series

Model	Bearing Combinations	Bearing	Basic Dynamic Load Rating (N)	Limiting Static Axial Rating (N)	Permissible Axial Load (N)	Preload (N)	Axial Rigidity (N/㎛)	Starting Torque (N·cm)
SWBK-17	DF	17TAC 47C	23,000	26,600	18,600	1,450	630	14
SWBK-17	DFD	17TAC 47C	37,500	53,000	37,100	1,970	930	19
SWBK-20	DF	20TAC 47C	23,000	26,600	18,600	1,450	630	14
SWBK-20	DFD	20TAC 47C	37,500	53,000	37,100	1,970	930	19
SWBK-25	DF	25TAC 62C	29,900	40,500	28,400	2,280	850	21
SWBK-25	DFD	25TAC 62C	48,500	81,500	57,100	3,100	1,250	28
SWBK-30	DF	30TAC 62C	30,500	43,000	30,100	2,400	890	23
SWBK-30	DFD	30TAC 62C	50,000	86,000	60,200	3,260	1,310	30
SWBK-35	DF	35TAC 72C	32,500	50,000	35,000	2,750	1,030	27
SWBK-35	DFD	35TAC 72C	53,000	100,000	70,000	3,740	1,500	34
SWBK-35	DFF	35TAC 72C	53,000	100,000	70,000	5,490	2,060	43
SWBK-40	DF	40TAC 72C	33,500	52,000	36,400	2,860	1,080	28
SWBK-40	DFD	40TAC 72C	54,000	104,000	72,800	3,900	1,590	36
SWBK-40	DFF	40TAC 72C	54,000	104,000	72,800	5,730	2,150	46
SWBK-50	DF	50TAC 100C	66,000	72,800	51,000	4,650	1,410	42
SWBK-50	DFD	50TAC 100C	107,000	145,600	101,900	6,320	2,100	57
SWBK-50	DFF	50TAC 100C	107,000	145,600	101,900	9,120	2,820	82

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

HBK Series

Model	Basic Load(Axial) (N)		Basic Load(Radial) (N)		Axial Rigidity (N/㎛)	Max. rpm (min^-1)	Max. Starting Torque (N·cm)
Model	Dynamic	Static	Dynamic	Static	Axial Rigidity (N/㎛)	Max. rpm (min^-1)	Max. Starting Torque (N·cm)
HBK-30	90,400	216,200	18,100	32,900	3,100	1,300	140
HBK-40	101,800	266,100	26,000	56,500	3,800	1,200	180
HBK-50	163,000	453,000	35,600	64,400	5,300	1,100	360

Recommended Shape Of Ball Screw Shaft-End (Fixed Side)

Dimensions (mm)						Lock-nut
d	A	Model		E	S	Model	Size M x pitch
Ø25 – Ø28	17	SWBK-17	DF	81	23	HLRN-17	M17 x 1.0
	17	SWBK-17	DFD	96	23	HLRN-17	M17 x 1.0
	20	SWBK-20	DF	81	23	HLRN-20	M20 x 1.0
	20	SWBK-20	DFD	96	23	HLRN-20	M20 x 1.0
Ø30 – Ø36	25	SWBK-25	DF	89	26	HLRN-25	M25 x 1.5
Ø30 – Ø36	25	SWBK-25	DFD	104	26	HLRN-25	M25 x 1.5
Ø40	30	SWBK-30	DF	89	26	HLRN-30	M30 x 1.5
		SWBK-30	DFD	104	26
		HBK-30		89	26
Ø45	35	SWBK-35	DF	90	28	HLRN-35	M35 x 1.5
			DFD	105
			DFF	120
Ø50 – Ø55	40	SWBK-40	DF	92	30	HLRN-40	M40 x 1.5
			DFD	107
			DFF	122
		HBK-40		101	30
Ø63 – Ø70	50	SWBK-50	DF	117	34	HLRN-50	M50 x 1.5
			DFD	137
			DFF	157
		HBK-50		111	34