SD QD Type Bushings

Category: QD Bushings

Description

SD Type Bushings

QD bushings are a common bearing type that can be installed easily and quickly. These bushings are flanged apart and tapered to clamp securely to the shaft. They are usually mounted with lock washers and cap screws and have a progressive taper of 3/4 inch per foot. Type QD bushings are easily identified by the letters in the part number. When installing the QD bushing, be sure to install it with a gap between the sprocket hub face and the inner diameter of the sprocket bushing. Its flanges are split over the entire circumference and provide positive clamping on the shaft. Bushings are an excellent choice for applications that require clamping force and are interchangeable between manufacturers. They can be used on pulleys, sprockets, and pulleys. For ease of installation, QD bushings are available in half-inch to one-inch sizes.

How to Install a QD Bushing

Installing QD bushings is relatively simple and requires the same procedures to be followed as other types of bearings. QD bushings should be clean and free of oil or anti-seize lubricants. Next, place the bushing on the shaft with the flange end up. Then, position the sprocket on the bushing and align the big end with the bushing. Tighten the bolts to the desired torque, remembering that fully tightening the screws will result in premature failure. After that, drill the holes and insert the pull-up bolts into the bushings.
QD bushings are split tapered flanged bushings with a flange connecting the bushing to the shaft. These bushings are used in applications such as sprockets, pulleys, and pulleys. They are interchangeable between manufacturers and have excellent clamping force. QD bushings are also used in a wide range of industrial environments. A typical QD bushing is 4 degrees in diameter and has two cap screws. Another type of QD bushing is “solder on adapter”. Designed for use in rotating units, this bushing has a straight outer diameter for easy installation and removal.

Dimensions of SD QD Type Bushings

Bushing Type: SD
Bore Size: 1-1/16″、1-1/4″、1-3/8″、1-9/16″、1/2″、1-9/16″、1/2″、11/16″、15/16″、2″、24mm、25mm、3/4″、30mm、 32mm、35mm、40mm、42mm、45mm、48mm、5/8″、1-9/16″、
Dimension (A): 0.500″
Dimension (B): 2.187″
Dimension (D): 3.188″
Dimension (E): 0.938″
Dimension (F): 1.250″
Dimension (G): 0.125″
Dimension (L): 1.813″
Bolt Circle: 2.688″
Set Screw Size: 1/4 – 20
Wrench Torque: 108 LBS
Weight: 1.50 LBS

Dismounting

Bushings serve many different purposes, including vibration isolation, shock absorption, and thermal shock absorption. While the sleeve provides the interface between the two components, its primary role is to dampen the energy transmitted through it. Some of the most common bushing types are listed below:
When your car bushings wear out, they will allow the joints to move more freely than they should. When driving over rough terrain, you may hear a popping sound, or you may notice that the steering wheel feels loose or floating. In addition to this, your car’s steering and suspension components may be unstable. These are signs that you need to replace the bushings on your car. However, if you don’t want to spend the time and money to replace the entire suspension, consider replacing the bushings.

Standard Mounting

1. Make sure the cone on the bushing and the inside of the driven product is clean and free of oil or any anti-seize lubricant.
2. Slide QD bushing on a shaft, flange end first, then assemble key.
3. Place the QD bushing on the shaft. Use only a standard Allen key to tighten the set screw on the key (hand-tight). Don’t push too hard.
4. Slide the large end of the sprocket or other part taper hole into place over the cone, aligning the drilled bolt holes on the sprocket or other part with the taper holes in the bushing flange. Then assemble the pull-up bolt and lock washer.
5. Tighten the pull-up bolts alternately and evenly to the tightening levels shown in the torque table below. Do not use extensions on wrench handles. There should now be a gap between the face of the sprocket or other part hub and the flange of the QD bushing to ensure a satisfactory tapered grip and press fit.
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Q1. Are you a factory?
A. Yes. We are a factory with more than 30 years of manufacturing experience.
Q2. Is OEM and ODM service available?
A. Of course. We have many years of experience in OEM& ODM service.
Q3. I am buying from another supplier, but need better service. Would you match or beat the price I am paying?
A. We always feel we provide the best service and competitive prices. We would be happy to personalize a competitive quote for you; email us.

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Packing&Shipping & Delivery

Packing Shipping Delivery

Chains package: First we will use carton package the chains--------then put in wooden box.

We also can custom color package according to your demand

Company Profile

FAQ

How to choose power transmissions parts and industrial products which meet our requirement

Chains	Sprockets	Pulleys	Timing belt Pulley	V-belt Pulley
Sheaves	Coupings	Bush &Hub	Gear& Rack	V-Belt
Locking Assembly	Pulley	Gearbox	Reducer	Shaft Collar
Rod End Bearing	Clevis	PTO	Chain Guide	Belt Guide
Rubber Buffer	Chain Tensioner	PTO Drive Shafts	Universal Joints	Roller Chains
Conveyor Chains	V-Belts	Worm Gearbox	Helical Gear	Worm
Agricultural Chain	CNC Proces Parts	Casting	Stamping
Powder Metallurgy	CNC Proces Parts	Casting	Stamping

What Products Do you sell ?

We are a group of factories, give customer one stop solution of power transmission and industrial products. We are in the position to supply wide range of products, including chains, sprockets, v-belt and v-belt pulleys, timing belt and timing belt pulleys, gears, speed reducers, motors, racks, couplings, and many other parts, like locking assembly, taper bushing, Chain guide, shaft collar, torque limiter, cam clutch, universal joint, motor base and motor slide, rod end, clevis, rubber mount, etc. We make special parts according to drawings and/or samples.

How to choose a gearbox which meets our requirement?
You can refer to our catalogue to choose the gearbox or we can help to choose when you provide
the technical information of required output torque, output speed and motor parameter etc.

What information shall we give before placing a purchase order?
a) Type of the gearbox, ratio, input and output type, input flange, mounting position, and motor informationetc.
b) Housing color.
c) Purchase quantity.
d) Other special requirements.

What industries are your gearboxes being used?
Our gearboxes are widely used in the areas of textile, food processing, beverage, chemical industry,
escalator,automatic storage equipment, metallurgy, tabacco, environmental protection, logistics and etc.

What is the producing process?

Production process including raw material cutting, machine processing, grinding, accessories cleaning, assemble, cleaning, stoving, oil coating, cover pressing, testing, package.

How to control the products quality?

Combining advanced equipment and strict management, we provide high standard and quality bearings for our customers all over the world.

What is the transportation?

-If small quantity , we Suggest to send by express, such as DHL,UPS, TNT FEDEX. If large amount, by air or sea shipping.

Can we design packaging?

-Yes. Default is regular packing, and we can make customer's own packing.

Can you provide OEM service?

-Yes, we work on OEM orders. Which means size, quantity, design, packing solution, etc will depend on your requests; and your logo will be customized on our products.

Can you give me discount on Power Transmissions Parts and Industrial parts?

-Yes, of course. Pls. send me your Email, you'll get more

Q: Are You a trading company or a manufacturer?

A: We Are the factory and have our Own trading company

Q: How Can I get an offer?

A: please send US quotation information: drawings, materials, weight, quantity and requirements, we can accept PDF, ISGS, DWG, STEP file format. If you don't have the drawings, please send us the samples, we can also quote you according to your samples.

Q: What is your minimum order size?

A: it is usually 100 pieces, but a low quantity is acceptable under some special circumstances.

Q: Do you provide samples? Is it free or extra?

A: Yes, we can provide samples free of charge, but we don't pay the freight.

Q: What is the lead time for mass production?

A: honestly, it depends on the number of orders. Normally, if you don't need the tools, deposit them after 30 days or so.

Q: What if the parts don't Work?

A: we can guarantee the quality, but if it happens, please contact us immediately, take some photos, we will check the problem and solve it as soon as possible.

Q: What are your terms of payment?

A: payment is less than US $1000,100% in advance. Payment: $1000,50% wire transfer in advance, balance before shipment,Other Terms of payment are negotiable