QD bushings are popular in many industrial applications. They are tapered, split through their flanges, and offer superior clamping force on shafts. They are commonly used in sprockets, pulleys, and sheaves. This design can increase the clamping force by up to 10 times over the standard bored-to-size bushing.
QD bushings are a popular type of bushing used in various applications. They are designed to provide excellent clamping force on a shaft. These bushings feature a split heavy-duty flange design.
QD Bushings are available in several different variations. The main differences include the length and diameter of the bore. Also, QD bushings can be reverse-mounted.
QD Bushing Dimensions
|Bushing||Dimensions (Inches)||Cap Screws Required||Stock Bore Range||Set Screw Size||Average Weight (lb)|
|A||B||D||E||F||G||L||Bolt Circle||Min .||Maximum|
|Standard Keyway||Shallow Keyway|
|JA||.375||1 .375||2||.688||.563||.210||1||1 .665||3 – 10 × 1||.375||1||1 .25||10 – 24||0 .9|
|SH||.438||1 .871||2 .688||.875||.813||.243||1 .25||2 .25||3 – .25 × 1 .375||.5||1 .375||1 .688||.25 – 20||1 .0|
|SDS||.5||2 .187||3 .188||.875||.75||.265||1 .315||2 .688||3 – .25 × 1 .375||.5||1 .688||2||.25 – 20||1 .0|
|SD||.5||2 .187||3 .188||.938||1 .25||.260||1 .813||2 .688||3 – .25 × 1 .875||.5||1 .688||1 .938||.25 – 20||1 .5|
|SK||.563||2 .812||3 .875||1 .375||1 .25||.317||1 .875||3 .313||3 – .313 × 2||.5||2 .125||2 .5||.313 – 18||2 .0|
|SF||.563||3 .125||4 .625||1 .5||1 .25||.322||2||3 .875||3 – .375 × 2||.5||2 .313||2 .316||.313 – 18||3 .0|
|E||.75||3 .834||6||1 .875||1 .625||.327||2 .625||5||3 – .5 × 2 .75||.875||2 .875||3 .5||.375 – 16||10 .0|
|F||.813||4 .437||6 .625||2 .813||2 .5||.423||3 .625||5 .625||3 – .563 × 3 .625||1||3 .313||3 .938||.5 – 13||11 .5|
|J||1||5 .148||7 .25||3 .5||3 .188||.423||4 .5||6 .25||3 – .625 × 4 .5||1 .438||3 .75||4 .5||.625 – 11||18 .0|
|M||1 .25||6 .5||9||5 .5||5 .188||.423||6 .75||7 .875||4 – .75 × 6 .75||1 .938||4 .75||5 .5||.75 – 10||37 .0|
|N||1 .5||7||10 .25||6 .625||6 .25||.423||8 .125||8 .5||4 – .875 × 8 .5||2 .438||5 .125||6||.75 – 10||57 .0|
|P||1 .75||8 .25||11 .75||7 .625||7 .25||.423||9 .375||10||4 – 1 × 9 .5||2 .938||5 .938||7||.875 – 9||120 .0|
|W||2||10 .437||15||9 .375||9||.564||11 .375||12 .75||4 – 1 .125 × 11 .5||4||7 .5||8 .5||1 – 8||250 .0|
|S||3 .25||12 .125||17 .75||12 .5||–||.814||15 .75||15||5 – 1 .25 × 15 .5||6||8 .25||10||1 .25 – 7||400 .0|
QD Bushing Sizes
QD Bushing Torque Capacity
BOLT TORQUE TABLE
|QD Bushing Size||Set Screw||Wrench Torque in ./lbs .|
|SH, SDS, SD||.25||–||20||108|
The metric system does not refer to keyseat or keyway dimensions, as does the English system; instead, dimensions are given for the key itself, which is
rectangular in shape, not square as in the English system.
Features of QD Bushings
QD-style bushings are precisely machined and then split on one side. The QD bushings can be placed over a pulley or sprocket. Once they are installed, QD bushings are easy to remove.QD bushings are among the most commonly used bushing designs for industrial use. They have a taper of about 1/4 inch/foot that provides double the force of gripping as other mounting systems for the bushing. They're also made of premium steel, with one split in the length of the bushing.
QD bushings come in various sizes. They are available in sizes ranging from JA to M. They also have an efficient mounting system that makes the installation and replacement effortless. The bushings can also be used in reverse, which allows you to put them on the opposite side of an axle.
QD bushings work well to use in power transmission or shaft connection. They feature a tapered grip which lets you remove them quickly without causing damage to the shaft.
QD Bushing Installation
Quick disconnect (QD) bushings are a good choice because they can be installed and removed easily. However, they can be damaged if they aren't installed correctly. Fortunately, there are a few simple steps to follow to ensure a proper installation.
First, use a torque wrench to tighten the bushing hardware, which will be a series of bolts and screws. Tighten them incrementally, as the bushing will seat better once it is properly snugged up. If the assembly isn't perfectly aligned, the bushing will not slide on the shaft as it should, and it may not function as it should. Also, do not over torque the hardware. It's a good idea to apply a little grease to the threads of the bushing's screws to prevent corrosion and contaminants.
Next, place the bushing in the sprocket. Make sure there is a sufficient gap between the sprocket and the bushing flange. You should also be able to slide the bushing on the shaft without having it draw into contact with the sprocket. This is a very important step, as misalignment can cause damage to the shaft and the bushing.
Once the assembly is secure, you can begin tightening the caps screws. The head of the cap screw should be visible, so be careful when inserting the screws into the pull-up holes.
QD Bushing VS Taper Lock Bushing
When deciding between a QD bushing or the taper lock bushing, it is crucial to consider the distinct differences between these two types. The former is made to allow for easy removal and installation as well as installation, while the latter is made to be permanently connected to the shaft. QD or “quickly detachable” bushings are split tapered flanged bushings with the split running through the flange and taper, while the taper lock bushing has straight sides on the OD which is meant to mount flush. Both types of bushings can be found in various shaft bore diameters. Take into consideration the dimensions of the part before choosing the one you want to use.
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
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