Sealed Ball Screw Support Unit
Tianjin OuNaiDa Transmissions Technology Co., Ltd. is one of the leading manufacturers and suppliers of sealed ball screw support unit in China. If you're going to buy high quality sealed ball screw support unit, welcome to get more information from our factory. Also, custom service is available.
Sealed Ball Screw Support Units - AK Fixed and AF Floated Series
Dust, grinding coolant, abrasive grit, and wood shavings are the primary causes of premature bearing failure in ball screw drive systems. Standard open or shield-only support units allow fine particles to enter the bearing raceways, degrading grease and creating axial play.
The AK (fixed side) and AF (floated side) series support units are specifically engineered for contaminated operating environments. Equipped with dual integrated contact oil seals, pre-assembled matched angular contact bearing pairs, and precision-ground reference surfaces, they ensure long-term positioning accuracy under heavy duty cycles.
Key Features & Engineering Advantages
- Dual Contact Lip Seals: High-grade NBR contact seals prevent particulate ingress and retain synthetic lubricant even under continuous vibration.
- Preloaded Angular Contact Bearings: Fixed AK units incorporate preloaded angular contact bearings (7000ZZ/7200ZZ series) to handle combined high axial and radial thrust loads with zero axial clearance.
- Standardized Center Heights: Drop-in interchangeability with standardized machine bed mountings, matching industry standard BK/BF centerline heights.
- Black Oxide Surface Finish: Corrosion-resistant matte black chemical conversion coating on rigid alloy steel housings.
Technical Specifications - AK Fixed Side
| Model | Shaft Dia (mm) | Width B (mm) | Height H (mm) | Center Height h (mm) | Mounting Pitch P (mm) | Bearing Type | Weight (kg) |
|---|---|---|---|---|---|---|---|
| AK10 | 10 | 70 | 43 | 25 ±0.02 | 52 | 7000ZZ / 6000 | 0.50 |
| AK12 | 12 | 70 | 43 | 25 ±0.02 | 52 | 7001ZZ / 6001 | 0.50 |
| AK15 | 15 | 80 | 49 | 30 ±0.02 | 60 | 7002ZZ / 6002 | 0.62 |
| AK20 | 20 | 95 | 58 | 30 ±0.02 | 75 | 7204ZZ / 6204 | 1.43 |
| AK25 | 25 | 105 | 68 | 35 ±0.02 | 85 | 7205ZZ / 6205 | 1.92 |
Application Matching
For complete axis protection, pair AK/AF sealed support units with Dust Proof Ball Screws and precision Flexible Shaft Couplings. Supplied complete with lock nut, collars, and holding lid.
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