Bushings

976 products

Tapered bushings that lock sheaves, sprockets, and pulleys to the shaft. Browning bushings follow the standard interchange, so bores and keyways match across manufacturers.

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Q-D Bushings391 products

Split Taper Bushings584 products

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Products in this category, with specifications, price, availability and quantity
Catalog #	Brand	Bore Size (in)	Bushing Type	Outside Diameter (in)	Length Through Bore (in)	Price	Add to order
S1 2 5/16	Browning	2.3125 in	S1	6.375 in	4.375 in	—	Request Quote
S1 2 3/8	Browning	2.375 in	S1	6.375 in	4.375 in	—	Request Quote
S1 2 5/8	Browning	2.625 in	S1	6.375 in	4.375 in	—	Request Quote
S1 2 11/16	Browning	2.6875 in	S1	6.375 in	4.375 in	—	Request Quote
S1 3 1/8	Browning	3.125 in	S1	6.375 in	4.375 in	—	Request Quote
S1 4 3/16	Browning	4.1875 in	S1	6.375 in	4.375 in	—	Request Quote
S1 4 1/4	Browning	4.25 in	S1	6.375 in	4.375 in	—	Request Quote
S2 2	Browning	2 in	S2	6.375 in	6.75 in	—	Request Quote
S2 2 1/8	Browning	2.125 in	S2	6.375 in	6.75 in	—	Request Quote
S2 2 3/16	Browning	2.1875 in	S2	6.375 in	6.75 in	—	Request Quote
S2 2 11/16	Browning	2.6875 in	S2	6.375 in	6.75 in	—	Request Quote
S2 2 7/8	Browning	2.875 in	S2	6.375 in	6.75 in	—	Request Quote
S2 3	Browning	3 in	S2	6.375 in	6.75 in	—	Request Quote
S2 3 1/8	Browning	3.125 in	S2	6.375 in	6.75 in	—	Request Quote
S2 3 1/4	Browning	3.25 in	S2	6.375 in	6.75 in	—	Request Quote
S2 3 11/16	Browning	3.6875 in	S2	6.375 in	6.75 in	—	Request Quote
S2 4 1/8	Browning	4.125 in	S2	6.375 in	6.75 in	—	Request Quote
S2 4 3/16	Browning	4.1875 in	S2	6.375 in	6.75 in	—	Request Quote
W1 3 7/16	Browning	3.4375 in	W1	12.5 in	8.25 in	—	Request Quote
W1 3 5/8	Browning	3.625 in	W1	12.5 in	8.25 in	—	Request Quote
W1 3 15/16	Browning	3.9375 in	W1	12.5 in	8.25 in	—	Request Quote
W1 4 1/8	Browning	4.125 in	W1	12.5 in	8.25 in	—	Request Quote
W1 4 3/8	Browning	4.375 in	W1	12.5 in	8.25 in	—	Request Quote
W1 4 5/8	Browning	4.625 in	W1	12.5 in	8.25 in	—	Request Quote
W1 4 7/8	Browning	4.875 in	W1	12.5 in	8.25 in	—	Request Quote

About Bushings

A bushing is what turns one sheave, sprocket or pulley into a part that fits many shafts. The hub is bored with a taper rather than to a shaft size, the bushing is a tapered sleeve split down its length, and drawing the two together on cap screws clamps the sleeve onto the shaft. Two systems are stocked and they are not interchangeable with each other. Browning Split Taper bushings have a solid flange, a double split barrel and an external key, and are keyed to both the shaft and the hub so the cap screws carry no drive torque. Q-D bushings have a flanged design that can be mounted with the flange facing either way, which is what lets a hub be fitted where access is tight.

Also known as: taper bushings, bushing kits, sheave bushings, shaft bushings

Series in this category

Split taper bushings — The Browning Split Taper line in the G, H, P, B, Q, R, S, U, W and Y letters, in inch, millimeter and spline bores.
Q-D bushings — The Q-D line in the JA, SH, SDS, SD, SK, SF and larger letters, in inch and millimeter bores.
Browning Q-D bushings — The Browning Q-D range on one page, with bore ranges, cap screw sizes and torque capacities set out together.
V-belt sheaves — The bushed sheaves these bushings mount, whose listings state which bushing letter the hub is bored for.
Sprockets — Bushed roller chain sprockets, which take the same Split Taper and Q-D bushings as the sheaves do.

How to choose bushings

The system is decided by the hub, not by preference: A hub is bored for one bushing system. A Split Taper hub takes a Split Taper bushing and a Q-D hub takes a Q-D bushing, because the taper, the flange and the cap screw pattern differ between them. So the first thing to establish is which system the sheave, sprocket or pulley already uses, and the listing for that part states it.
Then the letter, which is fixed by the part it mounts: Within a system the bushing letter is set by the hub as well: an H bored hub takes an H bushing and an SK bored hub takes an SK bushing. The letter determines the outside dimensions and the span of shaft sizes available, so it is read off the part being mounted rather than chosen for the shaft alone.
Last the bore, which is the only free choice: Having fixed the system and the letter, what remains is the bore and its keyseat, and this is where the shaft size enters. Split Taper bushings cover 3/8 to 7 7/16 inch across the range, with metric bores from 10 to 95 millimeters and spline bores as well. Q-D bushings cover 1/2 to 7 inch, with metric bores from 24 to 100 millimeters.
Tighten to the stated torque, in sequence: A tapered bushing grips because the cap screws draw it into the hub, so the clamping force is set by how they are tightened. Each listing carries a wrench torque figure, and the screws are tightened progressively and uniformly rather than one at a time to full torque. Overtightening a bushing can split a hub, and undertightening lets the assembly creep on the shaft.

Specifications explained

What each bushings specification means
Specification	What it means
Bushing type	The letter designation. Split Taper letters run G, H, P1 to P3, B, Q1 to Q3, R, S, U, W and Y; Q-D letters run JA, SH, SDS, SD, SK, SF and up.
Bore size and bore type	The finished bore the bushing is machined to, and whether that bore is inch, metric or, on Split Taper, spline.
Keyway or keyseat	The key cut in the bore, stated as width by depth, such as 1/4 by 1/8 inch or 20 by 6 millimeters.
Cap screws	How many screws draw the bushing into the hub, their thread and length, and on Q-D the bolt circle they sit on.
Wrench torque	The tightening torque for the cap screws, in inch-pounds on Split Taper and foot-pounds on Q-D.
Torque capacity	The drive torque the mounted bushing is rated to transmit, listed in inch-pounds on the Q-D range.
Material	Sintered steel, ductile iron, cast iron, gray iron or steel depending on the letter and the size.

Common questions

Are Split Taper and Q-D bushings interchangeable?

No. They use different tapers, different flange forms and different cap screw patterns, so a hub bored for one will not accept the other. Changing systems means changing the sheave, sprocket or pulley too. Within a system, however, Q-D bushings are made to be fully interchangeable with the equivalent Q-D bushings from other manufacturers.

Is the bushing included with a bushed sheave or sprocket?

No. A bushed part is stocked without a bore precisely so that one part number serves every shaft in the bushing's range, and the bushing is a separate listing ordered in the shaft size. An order for a bushed sheave or sprocket therefore has two lines: the part and the bushing in the bore the shaft needs.

Why does a Split Taper bushing have an external key?

It keys the bushing to the hub as well as to the shaft, so the drive torque passes through metal rather than through the cap screws. That is what gives the Split Taper system its torque capacity, and it is why the screws on one of these bushings are a clamping device rather than the drive path.

How do I remove a bushing that is stuck?

Use the tapped holes designed for it. On both systems, taking the cap screws out and threading them into the tapped withdrawal holes pushes the bushing back out of the taper as the screws are tightened progressively. The assembly then lifts off the shaft. Levering on the flange or driving the part off the shaft damages the hub and the bearing behind it.