Counter Gear / Cluster Shaft (Mazda BT-50)

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Counter Gear / Cluster Shaft Mazda BT50

Description

One-piece counter gear (cluster shaft) engineered for the Mazda BT-50 manual transmission. Five helical stages are precision-hobbed with edge relief; journals and locating faces are ground to ensure quiet, rigid mesh and high efficiency across all ratios. Manufactured from SCM415 / SAE 8620 alloy case-hardening steel and carburized & quenched to HRC 58–62, it delivers long-life wear and pitting resistance. Built to OE geometry and tolerances for a true drop-in during rebuilds.

Specification

Tooth Form: Helical

Tooth Set: 37 / 31 / 24 / 15 / 29 teeth

Material: SCM415 / SAE 8620 alloy case-hardening steel (or equivalent)

Heat Treatment: Carburized & quenched

Surface Hardness: HRC 58–62 (tough core retained)

Manufacturing: CNC turning/milling; precision hobbing; deburring/edge-relief; journal & face precision grinding; dynamic balance check