No Grooves on Hub of Joint Needed to Retain Boot!
For both intermittent and continuously rated joints where lubrication such as an oil bath is not available, we recommend the use of boots suitable for grease packing to retain lubricant and keep our contaminants. See chart below for available sizes for single joints. Boots can be used in pairs on the double joint. Curtis boots do not require grooves on the hub of the joint to hold the boot in place.
Curtis Boot Kits consist of one boot and two ties. Part numbers may be obtained on the Selection Guide provided below.
Curtis Low Profile Boots are typically manufactured from a polyvinyl chloride rubber blend, which is impervious to ozone and is ultraviolet stabilized. Our boots have a useful temperature range of -60°F to +220°F.
Custom Design Boots Available
Curtis will manufacture boots per your drawing requirements to meet your operating criteria or will design and fabricate boots to meet your specific needs. Send your requirements to Curtis, or Contact Curtis’ engineering department direct at 888-287-8477 for assistance in specifying a boot for your application.
Special Materials Available
Curtis can provide boots manufactured from various materials. Contact Curtis’ engineering department at 888-287-8477 for a list of available materials or advise them of your operating environment and they will specify a material for your application.

Catalog Number | Universal Joint Diameter | Maximum Outside Diameter | Overall Length |
A | B | C | |
CJ646-9K/54841 | 1.000 | 1.375 | 1.620 |
CJ648-9LK | 1.250 | 1.846 | 2.063 |
CJ650-9LK | 1.500 | 2.078 | 2.563 |
NB652-9LK | 2.000 | 2.609 | 3.250 |
CJ654-9LK/79741 | 3.000 | 4.882 | 5.252 |
Curtis Boot Kits consist of one boot and two nylon ties.
Boots are typically manufactured from a polyvinyl chloride rubber blend which is impervious to ozone and is ultraviolet stabilized.
Our boots have a useful temperature range of minus 60F to plus 220.