Support Units for Ball Screw, Support Side Narrow Pitch Square Type
Brand :
MISUMI
Caution
- New Size Specification will be updated soon
- Download Free! >>Economy Series Catalog ver2023 (TH-EN)_Part01 CLICK here
Product Description
・ Product type: Support Units for Ball Screw, Support Side Narrow Pitch Square Type, C-TBF series.
・ This is an economy item; The price is cheaper than the MISUMI standard product.
・ Applicable shaft outer diameter [mm]: 8, 10, 15, 20, 25
・ Shaft mounting height [mm]: 22, 25, 28, 34, 48
・ Material: Made of S45C with Ferroferric oxide protective film (Black Oxide)
・ Special Support Units for C7 to C10 rolled screw balls without pre-pressure. This product connects the support side (no motor connected) of the ball screw, featuring bearing holders, bearings, and buckles for sturdy support.
Product Overview
Dimensional Drawing
■Material Table
(*)Marked Low Temperature Black Chrome Plating is under preparation. Currently special order request can be accepted under the condition of MOQ.
(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.
| Type | Material | Surface treatment |
| ① | ① | |
| C-TBF | S45C equivalent | Black oxide |
| *C-TBFHR | 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. | |||||||||||||
| 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 | 43 | 25 | 35 | 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 | 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 | 140 | 96 | 52 | 88 | 79 | 114 | 72 | 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
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
