Support Units for Ball Screw, Support Side Narrow Pitch Square Type

Brand :

MISUMI

Caution

Product Description

This is an economy item, The price is cheaper than the MISUMI standard product.

Product Overview

Dimensional Drawing

■Material Table

Type	Material	Surface treatment
Type	①	①
C-TBF	S45C equivalent	Black oxide
*C-TBFHR	S45C equivalent	Low Temperature Black Chrome Plating

(*)Marked Low Temperature Black Chrome Plating is under preparation. Currently special order request can be accepted under the condition of MOQ.

Support Unit Rated Load

Bearing No.	Basic Dynamic Rated Load (N)	Basic Static Rated Load (N)
10	2310	960
12	3190	1380
15	3920	1980
17	6690	3360
20	6580	3500
25	9800	5500
30	13650	7910
35	17990	10710
40	20370	12530

Specification Table

Part Number		Axis Diameter d	L	B	H	Shaft Height h	B₁	H₁	P	V	d₁	d₂	ℓ	Retaining ring
Type	No.	Axis Diameter d	L	B	H	Shaft Height h	B₁	H₁	P	V	d₁	d₂	ℓ	Retaining ring
C-TBF (Black oxide) *C-TBFHR (Low Temperature Black Chrome Plating)	10	8	20	60	39	22	34	32.5	46	22	6.6	11	5	STWN8
	12	10		60	43	25	35	32.5	46	26			1.5	STWN10
	15	15		70	48	28	40	38	54	32			6.5	STWN15
	17	17	23	86	64	39	50	55	68	40	9	14	8.5	STWN17
	20	20	26	88	60	34	52	50	70	42	9	14	8.5	STWN20
	25	25	30	106	80	48	64	70	85	52	11	17.5	11	STWN25
	30	30	32	128	89	51	76	78	102	62	14	20	13	STWN30
	35	35	32	140	96	52	88	79	114	72	14	20	13	STWN35
	40	40	37	160	110	60	100	90	130	80	18	26	17.5	STWN40

(1), (2), and (3) are separate components. Please keep them properly.

(*)Marked Low Temperature Black Chrome Plating is under preparation. Currently special order request can be accepted under the condition of MOQ.

Product Features

Suface treatment comparison:
The black oxide type is cost-effective and can resist corrosion if protective oil is applied regularly.
If it is used in a high-humidity environment or requires less maintenance, it is recommended to use the low-temperature black chrome type.

Specification	Black Oxide	Low-Temperature Black Chrome
Method	Chemical conversion on steel surface forming black oxide layer	Electroplating black chrome at low temperature, usually with Ni underlayer.
Surface Quality	Matte black, prone to fading with abrasion.	Deep black, smooth, durable color, high aesthetics.
Coating Thickness	Very thin, ~0.5–1.5 μm, almost no dimensional change.	0.3–2 μm, thicker if Ni underlayer is applied.
Corrosion Resistance	Moderate, depends on oil layer; not suitable for long-term outdoor use.	Very high, withstands humid/salty environments, long coating life.
Advantages	Low cost, fast, no dimensional change, easy to reprocess.	Superior corrosion resistance, hard, durable color, high aesthetics.
Disadvantages	Poor corrosion resistance without maintenance, easy fading.	Complex process, higher cost.

Usage Method

Precautions

Example of Use