How to find the right Split-Tapered Locking Bushings AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Split-Tapered Locking Bushings
- Bushing system match
- Match the system and size letter cast or stamped on the hub (QD sizes such as JA, SH, SDS, SD, SK, SF, E, F, J, M, N, W, S; or Browning Split Taper sizes such as G, H, P1, Q1, R1). QD and Browning Split Taper are different tapers and bolt patterns. They do not interchange even when the bore is the same.
- Bore and keyway
- Order the exact shaft diameter (inch or metric) with its standard keyway. On the largest bores of a size, check whether the bushing uses a shallow keyway with a supplied flat key. A bushing cannot be rebored safely in the field. A wrong keyway causes slip or a cracked bushing.
- Cross-brand interchange
- A QD bushing from any maker fits a QD hub of the same size letter. Mixing a QD bushing with a Split Taper hub never works. QD is a de facto industry standard. Split Taper is specific to Browning.
- Mounting direction
- Decide on flange-in or flange-out (reverse) mounting before installing, based on the cap-screw access you will have. The flanged QD design can be mounted either way. Choose the side that leaves room to reach the cap screws for later removal.
- Material
- Use cast iron for general drives. Use steel or ductile iron for high torque or shock loads. Use stainless for washdown or corrosive areas. The bushing's material limits the torque it can carry and its life in harsh environments.
- Installation torque
- Tighten the pull-up cap screws evenly to the manufacturer's specified torque, and follow its instructions on lubrication. Over-tightening, or lubricating the taper when the maker says not to, can split a cast hub.
Brands that matter
- Browning: Originator of the QD bushing and maker of its own Split Taper bushing system.
- TB Wood's: Makes Sure-Grip bushings, which are QD-interchangeable.
- Martin Sprocket & Gear: Wide QD bushing range to match its sprockets and sheaves.
- Dodge: Offers QD bushings alongside its Taper-Lock line.
- Maska: Makes QD bushings and the sheaves that use them.
- Gates: Supplies QD bushings for its belt-drive sprockets and sheaves.
What to avoid
- Buying by bore size alone without confirming the size letter on the hub.
- Assuming a Browning Split Taper bushing is a QD bushing because both are flanged and split.
- Reusing pull-up cap screws that are stretched or have damaged threads.
- Hammering the bushing on or off instead of using the jacking holes.
Questions
How do I remove a QD bushing?
Take out the cap screws and thread them into the tapped jacking holes in the flange. Tighten them evenly to push the hub off the taper.
Is a split-taper bushing the same as a Taper-Lock?
No. Taper-Lock is flangeless and sits flush in the hub. QD and Split Taper bushings have a flange. Each needs a hub machined for its own system.