Choosing between the Yaskawa Minertia UGTMEM-06MMT51 and the Mitutoyo 908926 SRD Head for a Mitutoyo BHN506 coordinate measuring machine is not about picking a "better" part. It is about diagnosing which subsystem is causing your dimensional metrology machine inspection to fail. The drive motor controls axis movement; the reading head converts linear scale graduations into electronic signals. Choose wrong and you will still be chasing the same measurement error.
Quick verdict
If the BHN506's axes stall, vibrate, or fail to position, the Yaskawa Minertia UGTMEM-06MMT51 motor is the component to inspect. If the machine moves smoothly but reports position data that drifts or drops out, the Mitutoyo 908926 SRD Head is the likely culprit. The reading head is the lower-priced part at USD 399.00, while the motor is listed at USD 1,998.00. That price spread of USD 1,599.00 means you should confirm the failure mode before ordering.
Comparison at a glance
| Component | Role | Condition | Origin | Price | Price indicator |
|---|---|---|---|---|---|
| Yaskawa Minertia UGTMEM-06MMT51 | Axis drive motor | Used | Japan | USD 1,998.00 | |
| Mitutoyo 908926 SRD Head | Sensor reading head | Used | Japan | USD 399.00 |
Where each wins
- Yaskawa Minertia UGTMEM-06MMT51 wins when the failure is mechanical: axis motors drive the guide ways. It has high torque and low inertia for rapid dynamic response and smooth, vibration-free travel.
- Mitutoyo 908926 SRD Head wins when the controller gets poor position feedback. It reads linear scale graduations and translates movement into high-resolution signals for automated 3D inspection.
Product notes
Yaskawa Minertia UGTMEM-06MMT51 for Mitutoyo BHN506 Coordinate Measuring Machine
Yaskawa Minertia UGTMEM-06MMT51 is a used high-torque, low-inertia DC servo motor designed for the BHN506's axis drive. When the machine stalls, hunts, or vibrates during a move, this is the component to evaluate. It supports rapid dynamic response and smooth, vibration-free travel along CMM guide ways, making it the stronger choice when the scales, controller, and reading head are still producing stable data. The main limitation is price: it is the more expensive of the two parts, so you want a confirmed motor failure before committing; it is not a solution for scale-readout problems.
Mitutoyo 908926 SRD Head 10/10 For Mitutoyo BHN506 Coordinate Measuring CNC
If the BHN506 moves correctly but the controller reads drifting or missing positions, this sensor reading head is the targeted fix. The 908926 SRD Head reads linear scale graduations and converts physical axis movement into high-resolution electronic signals, with seamless data feedback and minimal signal degradation. It is a genuine Mitutoyo component, which matters when you need reliable scale readout for automated 3D inspection. Its limitation is scope: it only addresses scale readout. If the actual fault is a worn motor or failing drive, this head will not restore motion, and you need to look at the axis drive side of the BHN506 instead.
Final choice by use case
If you are seeing mechanical symptoms-axis hesitation, vibration, or loss of positioning during critical inspection routines-choose the Yaskawa Minertia UGTMEM-06MMT51. If you are seeing electronic readout symptoms-drifting coordinates, missed scale graduations, or intermittent feedback in an otherwise smooth-moving machine-choose the Mitutoyo 908926 SRD Head. In a dimensional metrology machine inspection setting, having the correct spare on hand matters more than saving money on the wrong part.
