Curtis Universal Joint Co., Inc. - Alloy Steel Single Joints
Curtis Universal Curtis Universal

Welcome To Curtis!

Curtis Universal Joint Co.
P.O. Box 70038
4 Birnie Avenue
Springfield, MA 01107

Tel 800-466-2144
Fax 413-737-8430

Customer Service Hotline: 888-885-6468

Product Application Hotline: 888-287-8477
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Alloy Steel Single Joints
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Stainless Steel 2

larger image 		Curtis Alloy Steel Joints feature 41L40-grade steel for all forks. Forks of 7/8 inch diameter and larger have induction-hardened bearing areas for strength and durability. The body (hubs) of the joints remain in an annealed state, which affords free machinability. Center blocks and pins are machined from 86L20 alloy steel. Center-blocks and pins are carburized and case hardened to generate superior wear characteristics yet remain ductile, thereby enabling the joint to handle shock loads without experiencing premature failure. Universal joint hub modifications are available per customer specifications, which include but may not be limited to bores, keyways, set screw holes, square holes and hex holes. Contact the Curtis sales department for more information.

Universal Applications
  • Stock Car Racers
  • Nuclear Installations
  • Tractor Attachments
  • In-Plant Utility Vehicles
  • Grain Augers

Joints of 7/8" O.D. and larger have Curtis' user friendly Take Apart feature to allow for more specialized modification. Our large inventory allows O.E.M.'s and users delivery on demand.





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Item #

Item Name

Breaking Load - Static Torque Rating Inch-lbs

"A" Outside Dia (Tol. + .000,
-.003)

"B" Bore Dia. (Tol. ± .001)

"C"
Total Length (Tolerance * ± 1/32 /
± 1/64)

"D" Hub/Bore Length (Tol.
± 1/64)

"E" Shaft to Shaft Distance

CJ641 Alloy Steel Single Joints 140 3/8 N/A 1-3/4 11/16 3/8
CJ642 Alloy Steel Single Joints 425 1/2 N/A 2 3/4 1/2
CJ643 Alloy Steel Single Joints 900 5/8 N/A 2-1/4 13/16 5/8
CJ644 Alloy Steel Single Joints 1610 3/4 N/A 2-11/16 31/32 3/4
CJ645 Alloy Steel Single Joints 1800 7/8 N/A 3 1-1/32 15/16
CJ646 Alloy Steel Single Joints 3050 1 N/A 3-3/8 1-3/16 1
CJ647 Alloy Steel Single Joints 3500 1-1/8 N/A 3-1/2 1-7/32 1
CJ648 Alloy Steel Single Joints 5500 1-1/4 N/A 3-3/4 1-1/4 1-1/4
CJ650 Alloy Steel Single Joints 9000 1-1/2 N/A 4-1/4 1-11/32 1-9/16
CJ651 Alloy Steel Single Joints 14000 1-3/4 N/A * 5 1-9/16 1-7/8
CJ652 Alloy Steel Single Joints 22000 2 N/A * 5-7/16 1-5/8 2-3/16
CJ653 Alloy Steel Single Joints 32000 2-1/2 N/A * 7 2-3/32 2-13/16
CJ654 Alloy Steel Single Joints 55000 3 N/A * 9 2-27/32 3-5/16
CJ655 Alloy Steel Single Joints 131000 4 N/A * 10-5/8 3-1/8 4-3/8
CJ641B Alloy Steel Single Joints 140 3/8 3/16 1-3/4 11/16 3/8
CJ642B Alloy Steel Single Joints 425 1/2 1/4 2 3/4 1/2
CJ643B Alloy Steel Single Joints 900 5/8 5/16 2-1/4 13/16 5/8
CJ644B Alloy Steel Single Joints 1610 3/4 3/8 2-11/16 31/32 3/4
CJ645B Alloy Steel Single Joints 1800 7/8 7/16 3 1-1/32 15/16
CJ646B Alloy Steel Single Joints 3050 1 1/2 3-3/8 1-3/16 1
CJ647B Alloy Steel Single Joints 3500 1-1/8 9/16 3-1/2 1-7/32 1
CJ648B Alloy Steel Single Joints 5500 1-1/4 5/8 3-3/4 1-1/4 1-1/4
CJ650B Alloy Steel Single Joints 9000 1-1/2 3/4 4-1/4 1-11/32 1-9/16
CJ651B Alloy Steel Single Joints 14000 1-3/4 7/8 * 5 1-9/16 1-7/8
CJ652B Alloy Steel Single Joints 22000 2 1 * 5-7/16 1-5/8 2-3/16
  Results 1 - 25 of 28 1 2