Description
Representative image shown. Actual product appearance varies by size, bore, and configuration. Refer to the specifications table for exact dimensions of this part number.
QD84XH400 Timing Pulley, 84 Teeth, XH Pitch
The QD84XH400 is a 84-tooth XH (0.875 in trapezoidal) timing pulley. It mounts with an industry-standard bushing, sold separately, machined from cast iron with a black oxide finish, built for 4 in wide belts. Machined from solid stock, never sintered or powdered metal.
Specifications

Dimension key for this construction type. Values for this part number are in the table below.
| Specification | Value |
|---|---|
| Part Number | QD84XH400 |
| Teeth | 84 |
| Pitch | XH (0.875 in trapezoidal) |
| For Belt Width | 4 in |
| Pitch Diameter | 23.3958 in |
| Outside Diameter | 23.2858 in |
| Bore | Accepts J bushing (not included) |
| Face Width | 4.688 in |
| Overall Length | 5.438 in |
| Construction | Quick Disconnect Hub |
| Material | Cast Iron (no sintered or powdered metal) |
| Finish | Black Oxide |
| Weight | 102 lb |
| Country of Origin | China |
Applications
- Instrumentation, office equipment, and precision positioning drives
- 3D printers and desktop CNC equipment
- Robotics, medical devices, and packaging machinery
Belt Compatibility
The QD84XH400 runs XH (0.875 in trapezoidal) belts in 4 in width. The pitch is standardized, so belt and pulley brands can be mixed.
Cross Reference
The QD84XH400 interchanges with these equivalent part numbers, per published manufacturer interchange data:
| Manufacturer | Equivalent Part Number |
|---|---|
| Martin | 84XH400 J |
| TB Woods® | 84XH400 |
| Regal Rexnord (Browning®) | 84XH400J |
| Jason Industrial | 84XH400J |
| Ametric | 84 XH 400 |
| Powerdrive | QD84XH400 |
| Continental (ContiTech) | 84XH400-J |
Always verify dimensions and bore size before substituting part numbers across manufacturers.
Buying in bulk? Save on volume.
Multi-unit and OEM quantities qualify for volume discounts. Call or email for a quantity quote.
Frequently Asked Questions
What belts fit the QD84XH400 pulley?
XH (0.875 in trapezoidal) timing belts in 4 in width from any manufacturer. The pitch is standardized, so belt and pulley brands can be mixed.
Does the QD84XH400 replace the Martin 84XH400 J?
Yes. Published interchange data crosses the QD84XH400 directly to the Martin 84XH400 J, as well as TB Woods 84XH400, Regal Rexnord 84XH400J, Jason Industrial 84XH400J. Verify dimensions and bore before ordering.
Does the QD84XH400 ship from Houston?
Yes. Stock items ship same day from our Houston, Texas warehouse. Call (888) 203-2358 to confirm availability.
All third-party part numbers and trademarks referenced are the property of their respective owners. References are for compatibility identification only and do not imply affiliation or endorsement.
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