Support Units for Ball Screw, Support Side Round Type
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MISUMI
- **RoHS Compliant is available for some part numbers.
Please contact with MISUMI for detail effective date.
This is an economy item, The price is cheaper than the MISUMI standard product.
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.
| Type | Material | Surface treatment |
| ① | ① | |
| C-TFF | S45C equivalent | Black oxide |
| *C-TFFHR | 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 and Rated Load
| Bearing No. | Basic Dynamic Rated Load (N) | Basic Static Rated Load (N) |
| 3 | 440 | 150 |
| 4 | 910 | 340 |
| 6 | 1580 | 580 |
| 10 | 2310 | 960 |
| 12 | 3190 | 1380 |
| 15 | 3920 | 1980 |
| 17 | 6690 | 3360 |
| 20 | 8960 | 4620 |
| 25 | 9800 | 5500 |
| 30 | 13650 | 7910 |
Specification Table
| Part Number | Axis Diameter d | L | H | F | D | A | P.C.D. | B | V | d1 | d2 | ℓ | Retaining ring | |
 Type |  No. | |||||||||||||
| C-TFF (Black oxide) *C-TFFHR (Low Temperature Black Chrome Plating) | 3 | 3 | 10 | 6 | 4 | 18 | 32 | 24 | 25 | 10 | 3.4 | 6.5 | 4 | Thickness 0.25 |
| 4 | 4 | 13 | Thickness 0.25 | |||||||||||
| 6 | 6 | 22 | 36 | 28 | 28 | 17 | STWN6 | |||||||
| 10 | 8 | 12 | 7 | 5 | 28 | 43 | 35 | 35 | 22 | STWN8 | ||||
| 12 | 10 | 15 | 8 | 34 | 52 | 42 | 42 | 26 | 4.5 | 8 | STWN10 | |||
| 15 | 15 | 17 | 9 | 40 | 63 | 50 | 52 | 32 | 5.5 | 9.5 | 5.5 | STWN15 | ||
| 17 | 17 | 20 | 11 | 9 | 50 | 77 | 61 | 61 | 40 | 6.6 | 11 | 6.5 | STWN17 | |
| 20 | 20 | 57 | 85 | 70 | 68 | 47 | STWN20 | |||||||
| 25 | 25 | 24 | 14 | 10 | 63 | 98 | 80 | 79 | 52 | 9 | 14 | 8.5 | STWN25 | |
| 30 | 30 | 27 | 18 | 9 | 75 | 117 | 95 | 93 | 62 | 11 | 17.5 | 11 | STWN30 | |
(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.
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
