DIRECT REPLACEMENT: High-quality replacement for Shopsmith part #503574, compatible with Power Station, MARK 7, MARK V, and MARK 4 models with durable ABS Black construction.
SAFETY FEATURE: Functions as a mechanical fuse that shears under extreme overload conditions to protect your connected tools and motors from potential damage.
PRECISION ENGINEERING: Features perfectly matched splines that securely mate with Shopsmith's metal hub system, creating a tight, vibration-resistant connection.
EASY INSTALLATION: Simple to replace without special tools, making maintenance straightforward while restoring smooth operation to your Shopsmith equipment.