LORD Square Bonded Rubber Bushing

Part # J-8203-31

LORD Square-Bonded Bushings are used in applications where the absorption shock, attenuation of noise, reduction of wear and elimination of lubrication is required.

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Max Radial Static Load Rating 1000 lbs. / 4448 N
Radial Spring Rate (K rad) 30,000 lbs./in. / 5253 N/mm
Static Torque @ 15 degrees 750 lbs.-in. / 1016 N-mm SEE NOTES
Part No. J-8203-31 | J820331
Manufacturer LORD Corporation
Part Category

Vibration Control

Part Section Bushings
Part Type Square-Bonded Bushings
Part Status
Call +1 800 657-0747 or use the
webform to the right on this page
Part Alternative
Call +1 800 657-0747  or use the
webform to the right on this page


Catalog Page No.
Catalog Section Page No.
Rubber Parts Catalog Bushings Page 6
LORD PC7000 Bushings Page 80
LORD PC-2201m Bushings Page 74




Dimensions Technical Drawing
Dimension Measurement
A 2.38 in. / 60.5 mm
B 3.25 in. / 82.6 mm
C 1.39 in. / 35.0 mm
D 1.62 in. / 41.1 mm
E 2.15 in. / 54.6 mm
F 2.25 in. / 57.2 mm
G 3.00 in. / 76.2 mm
H 0.191 in. / 4.9 mm
I 1.442 in. / 36.7 mm
J 0.09 in. / 2.3 mm
NOTES: Red figures are metric reference. ***Notes only apply if called out in table***





For installation instructions, refer to Bushings, Installation Guide section. Heavy wall tubing is recommended for proper operation.

Rated static angular deflection

Rated static angular deflection is 15° for all parts. Maximum recommended deflection, static plus dynamic is 45° for all parts. Heavy wall tubing is recommended for proper operation.

Bushing Selection

To select a Square-Bonded Bushing for your requirements, compute the static torsional load it must support. Select from Tables 1-2, a bushing with static torque at 15° which is equal to or greater than the computed load.

Compute the static plus the dynamic torsional load. If this total load exceeds three times the static torque at 15°, select a larger size static torque rating part. Static radial load should also be computed and compared to the maximum static radial load listed above. Dynamic plus static radial load can also be three times loads listed above.

Custom Designs

Customized designs and special elastomer compounds for specific problems are available. These may result in spring rates and dimensions other than shown.

A part’s listing on this website does not guarantee its availability.





Custom Parts

Our custom molding department can make a part just for your application.


Would you like some assistance in selecting the right mount for your application?  Our engineering department can help.  Please call or use the webform below.  We will be glad to assist.

Not what you are looking for?

Our knowledgeable staff can assist you with whatever you need.  From Special Packaging, Overnight shipments to applications engineering. DeltaFlex is ready to help find a solution.

Engineering Assistance

"Frequently vibration isolation problems require a system engineering analysis..." - Put us to work for you.

DeltaFlex has the computer capability, as well as specialized programs, for analyzing engine/transmission combinations. The output from these analyses is a mounting proposal which optimizes performance over the complete range of operating speeds. This service is available to you upon request. If you require this type of engineering assistance please call 800.657.0747 we will be glad to assist you.

What is the impact of Vibration Control?

The biggest impact that vibration isolation can have, is with the end users of our customers products, more importantly their perception of the quality of those products.

Values states herein represent typical values as not all test are run on each lot produced. For formalized product specifications or specific product end uses, contact Customer Service 262.632.2345.

A part’s listing on this website does not guarantee its availability.