FK12 FF12 Ball Screw End Support Set for CNC 1605 Machine
FK12 FF12 Ball Screw End Support Set for CNC 1605 Machine
FK12 & FF12 Ball Screw End Support Set – CNC 1605 Fixed & Floating Side Bearing Blocks
Upgrade your CNC machine build with this precision-engineered FK12/FF12 Ball Screw End Support Set. Designed for 1605 ball screw assemblies, this kit includes both the FK12 fixed-side and FF12 floating-side bearing blocks to deliver stable, accurate, and long-lasting linear motion performance. Made from carbon steel with a black oxidizing surface treatment, these supports offer excellent rigidity and corrosion resistance for demanding workshop environments.
Made in Mainland China.
Key Features
- Pre-lubricated FK-type bearings — loaded with the correct amount of lithium soap grease and sealed with a special gasket for immediate installation and extended service life
- Black oxidized surface finish — high-precision treatment that enhances corrosion resistance and durability
- High rigidity & precision — ensures stable rotational performance and minimizes backlash for accurate CNC positioning
- Carbon steel construction — robust material choice for demanding machine tool environments
- Straightforward mounting — fixed side secures to the threaded rod with a lock nut, cushion block, and hex bolts; floating side bearing is retained with a stop ring and loaded into the bearing housing
Product Specifications
| Specification | Details |
|---|---|
| Model | FK12 (Fixed) / FF12 (Floating) |
| Compatible Ball Screw | 1605 Ball Screw |
| Material | Carbon Steel |
| Color | Black |
| Surface Treatment | Black Oxidizing (Blackening Process) |
| Lubrication | Pre-filled lithium soap grease |
| Package Contents | 2 × FK12 Bearing Blocks + 2 × FF12 Bearing Blocks |
Installation Guide
- Secure the FK12 fixed-side block onto the threaded rod end of the ball screw.
- Tighten the lock nut and fasten with a cushion block and hex socket bolts.
- On the floating side, insert the FF12 bearing block and retain the bearing with a stop ring before loading it into the bearing housing.
Note: Due to lighting conditions and monitor calibration, the item color in photos may vary slightly from the actual product. Dimensional measurements carry a tolerance of ±1–3 mm.
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Frequently Asked Questions
Q: What ball screw diameter is this FK12 FF12 support set compatible with?
A: This FK12/FF12 end support set is designed specifically for 1605 ball screws (16 mm diameter, 5 mm lead). The FK12 handles the fixed end while the FF12 accommodates thermal expansion on the floating end, making them ideal for DIY CNC router and milling machine builds.
Q: Do I need to lubricate these bearing blocks before installation?
A: No — the FK12 bearing blocks come pre-filled with lithium soap grease and are sealed with a special gasket, so they are ready to install straight out of the package. Periodic re-lubrication is recommended for high-duty-cycle applications to maintain optimal performance.
Q: What is the difference between the FK12 (fixed side) and the FF12 (floating side) bearing block?
A: The FK12 fixed-side block fully constrains the ball screw axially and radially using a lock nut and hex bolts, preventing any end movement. The FF12 floating-side block supports the screw radially while allowing slight axial movement to compensate for thermal expansion during operation, preventing binding and extending screw life.
Q: What material are these ball screw support blocks made from?
A: Both the FK12 and FF12 support blocks are manufactured from carbon steel with a black oxidizing surface treatment. This combination provides high rigidity, good wear resistance, and protection against corrosion in typical workshop environments.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.