KHW-M2645-00 YS12YS24Screw rod bearing 7001A-P5 7000A-P5 90990-26J008
KHW-M2645-00 Ballscrew Bearing Set – Yamaha YS12 / YS24 SMT Machines
Overview
The KHW-M2645-00 is a precision ballscrew support bearing assembly used in Yamaha YS12 and YS24 pick-and-place machines. This component set ensures smooth and accurate rotational movement of the ballscrew, which drives the X or Y axis during high-speed, high-precision placement operations.
This assembly includes high-precision angular contact bearings: 7001A-P5, 7000A-P5, and the housing cap part 90990-26J008.
Key Components
| Part Number | Description |
| 7001A-P5 | Angular contact bearing, P5 (ISO class 5) precision, used for axial load support and rigidity |
| 7000A-P5 | Smaller angular contact bearing, also P5 grade, typically paired in tandem |
| 90990-26J008 | Bearing cap or retainer used for bearing housing in Yamaha platforms |
| KHW-M2645-00 | Complete bearing housing set including the above components, preconfigured for Yamaha YS series |
Features & Benefits
High Precision: P5 grade angular contact bearings ensure low runout and high axial load capacity
Durability: Designed for long life in continuous high-speed operations
Factory Fit: Direct replacement for original Yamaha parts in YS12/YS24 models
Minimal Vibration: Supports high-speed rotation of the ballscrew with minimal mechanical backlash
Easy Replacement: Modular assembly designed for ease of service and alignment
Applications
Used in: Yamaha YS12, YS24 SMT pick-and-place machines
Function: Supports and stabilizes the ballscrew shaft in X or Y axis drive systems
Location: Typically found on the motor-driven end of the ballscrew
Summary
The KHW-M2645-00 bearing assembly, including 7001A-P5, 7000A-P5, and 90990-26J008, is an essential component for maintaining the accuracy, stability, and speed of the ballscrew drive system in Yamaha YS12 / YS24 SMT machines. It offers superior performance in demanding production environments and is built to meet high-speed placement accuracy requirements.
Related Accessories for KHW-M2645-00 Ballscrew Bearing Set
| Category | Example Part Number | Description |
| Ballscrew Shaft | KHW-M2638-00 | Precision ballscrew shaft that works with the bearing assembly |
| Ballscrew Nut Assembly | KHW-M2639-00 | Recirculating ball nut that interfaces with the ballscrew shaft |
| Ballscrew End Support | KHW-M2640-00 | End support bracket for ballscrew assembly, houses the bearing set |
| Linear Guide Rails | KHY-M2642-00 | Linear rails that complement ballscrew motion for axis precision |
| Coupling (Motor to Ballscrew) | KHW-M2650-00 | Flexible or rigid coupling connecting motor shaft to ballscrew |
| Bearing Housing Cover | 90990-26J008 | Protective cover or cap for bearing housing |
| Lubrication Kits | Various | Grease or oil kits recommended for maintaining ballscrew and bearings |
| Mounting Hardware | Yamaha Standard M3/M4 Screws | Screws and fasteners to secure bearing assembly and ballscrew parts |
Notes:
These accessories help maintain the smooth and precise operation of the ballscrew drive system on the Yamaha YS12 and YS24 machines.
Always use genuine Yamaha parts for best compatibility and durability.
Proper lubrication and maintenance of bearings and ballscrews are essential for optimal performance.
Related Part Numbers – KHW-M2645-00 Ballscrew Bearing Assembly
| Part Number | Description |
| KHW-M2645-00 | Complete ballscrew bearing set (includes 7001A-P5, 7000A-P5, 90990-26J008) |
| 7001A-P5 | Angular contact bearing (P5 precision class) |
| 7000A-P5 | Angular contact bearing (P5 precision class) |
| 90990-26J008 | Bearing housing cap or retainer |
| KHW-M2638-00 | Ballscrew shaft |
| KHW-M2639-00 | Ballscrew nut assembly |
| KHW-M2640-00 | Ballscrew end support bracket (bearing housing) |
| KHY-M2642-00 | Linear guide rails |
| KHW-M2650-00 | Motor-to-ballscrew coupling |
| Yamaha standard screws | M3/M4 mounting screws and fasteners |
Notes:
Part numbers correspond to Yamaha OEM components designed for YS12 and YS24 models.
Confirm compatibility with your specific machine model before ordering.
Use genuine parts to ensure precision and durability.
FAQ Guide — KHW-M2645-00 Ballscrew Bearing Set (Yamaha YS12/YS24)
1. What is the KHW-M2645-00?
It is a complete ballscrew bearing assembly designed for Yamaha YS12 and YS24 SMT machines, comprising high-precision angular contact bearings and bearing housing components to support the ballscrew shaft.
2. What bearings are included in this set?
The assembly includes:
7001A-P5 angular contact bearing
7000A-P5 angular contact bearing
Bearing housing cap 90990-26J008
3. What is the purpose of these bearings?
They support the ballscrew shaft, allowing smooth and accurate rotation with minimal friction and axial play, which is critical for precise X/Y axis movement in SMT machines.
4. How do I know if the bearings need replacement?
Common signs include:
Excessive noise or grinding during axis movement
Increased backlash or positioning errors
Visible wear or damage during inspection
Vibration or shaking of the ballscrew assembly
5. Can I replace the bearings myself?
Yes, if you have mechanical expertise and proper tools. It involves disassembling the ballscrew end support, removing old bearings, cleaning the housing, installing new bearings, and reassembling carefully to maintain alignment.
6. What lubrication is recommended?
Use high-quality grease or oil compatible with high-speed bearings, as specified in Yamaha maintenance manuals. Proper lubrication reduces wear and extends bearing life.
7. How often should these bearings be maintained or replaced?
Maintenance intervals depend on machine usage but typically:
Inspect bearings every 6–12 months
Replace bearings if any defects or performance issues arise
Follow Yamaha’s preventive maintenance schedule
8. Where can I get genuine replacement parts?
Purchase from authorized Yamaha SMT parts distributors or trusted vendors specializing in Yamaha components.
9. Are the 7001A-P5 and 7000A-P5 standard bearings?
Yes, these are ISO P5 precision angular contact bearings widely used in precision machinery, but ensure to use the exact models specified for Yamaha machines to guarantee fit and performance.
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KHW-M2645-00 YS12YS24Screw rod bearing 7001A-P5 7000A-P5 90990-26J008 Images
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