Graco 866212 Key Square 3/16 x 1.35

What the Graco 866212 Square Key Is For

The Graco 866212 Key, Square, 3/16 x 1.35 is a precision square drive key used in mechanical drive systems to secure rotating parts like sheaves, gears, and couplings on sprayers and fluid drive motors where a 3/16″ square keyway is needed. It’s a critical alignment and torque transfer component.

Compatible Machines

This square key is referenced as a service part in the internal parts breakdowns of several Graco units that use keyed drive shafts or gear assemblies:

• Airlessco / Graco TS1500 Series Airless Sprayer — motor/gear drive assemblies include square key 866212. :contentReference[oaicite:1]{index=1}
• Graco Airless Sprayers with keyed gear drives — units using square drive connections on sheaves and couplings. :contentReference[oaicite:2]{index=2}
• Graco Sprayers with Internal Gear/Motor Assemblies — typically older or industrial models where keyed shafts and gear sheaves require this key. :contentReference[oaicite:3]{index=3}

Specifications & Details

Frequently Asked Questions