Double 608 Bearing Guide Pulley for Winch / Hoist

When building winches, lifting mechanisms, or high-speed launch rails, a single bearing can sometimes tilt under the tension of the rope. I designed this much wider pulley to accept two 608 bearings, distributing the load evenly across an 8mm axle. The deep V-groove profile ensures that your paracord, rope, or cable stays securely tracked in the center without slipping off the edges.

Features

• Dual Bearing Core: Press-fit slots for two 608 bearings for maximum smoothness and stability.

• Wide Deep Groove: Safely accommodates thicker ropes and prevents derailment during operation.

• Heavy Load Ready: Ideal for linear motion systems, heavy lifting, or high-tension cord mechanisms.

Hardware Required

• 2x 608 Bearings: (8mm ID x 22mm OD x 7mm Width).

• 1x 8mm Axle: An M8 bolt, a piece of 8mm smooth rod, or a sturdy 3D printed pin.

Print Settings

This was designed to print easily with standard settings, though a few extra walls will help with the press-fit strength.

• Layer Height: 0.20 mm

• Infill: 15-20% (Gyroid or Grid)

• Wall/Perimeter Count: 3 to 4 walls (Highly recommended to ensure the bearing socket doesn't split when pressing them in).

• Supports: No supports required if printed flat on its side.

• Material: PLA, PETG, or ABS.

Assembly Note The bearing tolerances are designed for a tight press fit. Lay the pulley flat on a table, align the bearing, and press firmly and evenly. Repeat on the other side.