Need a hardened, ground helical rack? ZST and ZSTD are shown together on the KHK range page.
Customer: Which family should I specify?
KAYO: Use the complete model designation to identify the module and rack format. Confirm the mating pinion and mounting geometry from the manufacturer drawings.
Customer: Which models and sizes are shown?
KAYO: The current Japanese selection table lists 16 model codes for this group. Module values: 2, 3, 4, 5, 6. Representative dimensions are shown below, followed by the complete model list.
| Model | Module | Overall length (mm) | Face width (mm) | Mass (kg) |
|---|---|---|---|---|
| ZST2-1000R | 2 | 1000 | 24 | 4.13 |
| ZST4-1000R | 4 | 1000 | 39 | 10.7 |
| ZSTD2-1000RJ | 2 | 1000 | 24 | 4.05 |
| ZSTD4-1000RJ | 4 | 1000 | 39 | 10.4 |
| ZSTD6-1000RJ | 6 | 1000 | 59 | 18.6 |
Customer: What should I check before installation?
KAYO: Use the matching pinion geometry and verify the joint and mounting arrangement for the selected rack. For a helical rack, check pitch, helix angle and opposite helix hand of the pinion. Provide bearing support for axial thrust and verify alignment along the full travel.
Customer: What are the exact model numbers?
KAYO: ZST2-1000R, ZST2-2000R, ZST3-1000R, ZST3-2000R, ZST4-1000R, ZST4-2000R, ZST5-1000R, ZST6-1000R, ZSTD2-1000RJ, ZSTD2-2000RJ, ZSTD3-1000RJ, ZSTD3-2000RJ, ZSTD4-1000RJ, ZSTD4-2000RJ, ZSTD5-1000RJ, ZSTD6-1000RJ.
Customer: What should I send for an enquiry?
KAYO: Please send the complete model code, quantity, required travel, mating pinion, mounting details, speed and load. We can discuss the specification and availability for your application. Confirm final dimensions and suitability against the latest manufacturer information.
References: KHK ZST / ZSTD official selection page | KHK rack product range.