Selecting an MMS spiral miter gear? This family offers a separate set of catalog models for a change of shaft direction.
Customer: What distinguishes this family?
KAYO: MMS is listed as spiral miter gears in the KHK range. The manufacturer identifies the material as SCM415. Miter gears are used where a change in shaft direction is needed with a 1:1 tooth-count ratio.
Customer: Which sizes are listed?
KAYO: The current Japanese selection table shows 24 model codes. Modules: 2, 2.5, 3, 4, 5. Tooth counts: 20, 25, 30. Representative dimensions are shown below, followed by the complete model list. Mass is stated in kilograms.
| Model | Module | Teeth | Outside diameter (mm) | Mass (kg) |
|---|---|---|---|---|
| MMS2-20R | 2 | 20 | 42.31 | 0.13 |
| MMS4-20R | 4 | 20 | 84.99 | 0.92 |
| MMS2.5-25R | 2.5 | 25 | 65.54 | 0.47 |
| MMS5-25R | 5 | 25 | 130.86 | 3.39 |
| MMS5-30L | 5 | 30 | 155.9 | 6.44 |
Customer: How should I select the mating gear?
KAYO: Check the compatible MMS mate and opposite spiral hands as well as module and tooth count. Module and tooth count are only part of the selection; the tooth system and assembly geometry must also agree. Use the manufacturer mating guidance for the exact family.
Customer: What are the exact model numbers?
KAYO: MMS2-20R, MMS2-20L, MMS2.5-20R, MMS2.5-20L, MMS3-20R, MMS3-20L, MMS4-20R, MMS4-20L, MMS5-20R, MMS5-20L, MMS2-25R, MMS2-25L, MMS2.5-25R, MMS2.5-25L, MMS3-25R, MMS3-25L, MMS4-25R, MMS4-25L, MMS5-25R, MMS5-25L, MMS4-30R, MMS4-30L, MMS5-30R, MMS5-30L.
Customer: What should I check before installation?
KAYO: Confirm mounting distance, shaft alignment, bearing support and backlash. Check the contact pattern during assembly and choose lubrication suited to the selected material and operating conditions. Evaluate the load rating against the actual speed and duty.
Customer: What should I send for an enquiry?
KAYO: Please share the complete model code, quantity, mating gear, shaft angle, bore and keyway requirements, operating speed and load. We can discuss the specification and availability for your application.
References: MMS official model selection table | KHK miter range. Confirm final dimensions and suitability against the latest manufacturer drawing.