XRAY NT1 Racing Brake Pulley 21T XN1-47/RE by 3Racing  [XN1-47/RE]

Price:
USD$11.70
Brand:
3Racing
Model:
XN1-47/RE
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Technical Notes

Precision replacement pulley for Team XRAY NT1 brake assemblies, identified by part number XN1-47/RE. The 21-tooth unit is intended as a direct swap to restore or refine actuation consistency and to help drivers rapidly tune pedal response for competitive setups.

Workshop guidance: strip the brake assembly following standard service processes, inspect the related 走珠軸承 and brake arm for tolerance drift, ensure the pulley tracks the cable or linkage concentrically, and apply the correct fastener preload to avoid micro-slip without risking thread damage. This component is for scale model use only.

Tuning focus: replacing the pulley alters mechanical leverage and engagement slope. Use the part to fine-tune lever geometry, eliminate slack in the linkage, and combine the change with bearing servicing to stabilise braking behaviour across repeated cycles.

What measurements confirm fitment?

Verify pulley outer diameter, tooth count and bore pattern against the original part, and check that the mounting face sits flush with the brake arm to avoid eccentric loading.

How should I set linkage free play after fitting?

Minimise free play to improve repeatability while keeping a small neutral clearance to prevent binding; recheck under load to confirm consistent return to neutral.

Any specific bearing attention required?

Inspect the 走珠軸承 for smooth rotation and radial play; replace worn bearings and use appropriate light lubrication to maintain low friction and precise actuation.