

This 12‑tooth mushroom‑head drive coupler is a critical transmission replacement part for commercial & household blenders, smoothie makers and food processors. Made of high‑strength rubber integrated with precision metal inner spline, it transfers motor torque to blender blade assembly.
A very common failure: blender motor spins but blades won’t turn. Usually the internal spline teeth wear out, slip or strip. Instead of buying a brand‑new blender, simply replace this low‑cost coupler to restore full machine function.
Outer Diameter: 38 mm
Inner Diameter: 16 mm
Tooth Quantity: 12 teeth
Max root diameter of spline teeth: 16 mm
Height: 27 mm
Partial height:10 mm
Weight:18.6 g
Note: All sizes are manually measured, slight tolerance exists.

Household blenders & smoothie machines
Commercial bar blenders
Appliance repair shops spare‑parts stock
Blender importers, SKD / CKD kits
After‑sales service replacement components

A: Yes. This is the most typical symptom. When internal 12 spline teeth are worn, stripped or rounded, motor spins freely without driving blades. Please compare dimensions (OD38mm,12 teeth, inner diameter16mm) with your original part before purchase.
You may send clear photos of your old broken coupler for compatibility verification.
A: No. This is spline socket‑on type, no thread. It is directly fitted onto motor spline shaft. It cannot replace M5 screw‑on drive coupler.
A: Small sample orders are acceptable. You can mix with blender jars, blade sets, sealing gaskets and other spare parts for one shipment.
A: Yes. We support custom mould for different sizes, tooth counts and shapes for large‑volume orders. Please provide samples or dimension drawings.
