Curtis Universal Joint Co., Inc. - Turn-Key / Ready-To-Use 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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Turn-Key / Ready-To-Use Joints
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Alloy Turnkey Reduced

larger image 		In alloy steel, we have all standard sizes available in stock, ranging from 3/8 inch to 4 inch O.D. with standard bores (one-half of the O.D.), keyways and installed set screws. The 3/8 inch and 1/2 inch joints come with set screws only, while other standard O.D. sizes include keyways. Joints 7/8 inch or 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.


Universal Applications
  • Tractor Steering
  • Commercial Ovens
  • Bowling Alley Cleaning
  • Missile Containers
  • Snow Blowers


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.

Also available in 303 stainless steel.



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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" Set Screw Size

"F" Keyway Size

"G" Far Side to Bottom of K/W (Tol. +.010,
-.000)

"H" Shaft to Shaft Distance

CJ641B1SS Turn-Key / Ready-To-Use Joints 140 3/8 3/16 1-3/4 11/16 2-56 NC N/A N/A 3/8
CJ642B1SS Turn-Key / Ready-To-Use Joints 425 1/2 1/4 2 3/4 4-40 NC N/A N/A 1/2
CJ643BKW1SS Turn-Key / Ready-To-Use Joints 900 5/8 5/16 2-1/4 13/16 10-32 NF 3/32 x 3/64 .352 5/8
CJ644BKW1SS Turn-Key / Ready-To-Use Joints 1610 3/4 3/8 2-11/16 31/32 10-32 NF 3/32 x 3/64 .416 3/4
CJ645BKW1SS Turn-Key / Ready-To-Use Joints 1800 7/8 7/16 3 1-1/32 10-32 NF 3/32 x 3/64 .480 15/16
CJ646BKW1SS Turn-Key / Ready-To-Use Joints 3050 1 1/2 3-3/8 1-3/16 1/4-20 NC 1/8 x 1/16 .555 1
CJ647BKW1SS Turn-Key / Ready-To-Use Joints 3500 1-1/8 9/16 3-1/2 1-7/32 1/4-20 NC 1/8 x 1/16 .618 1
CJ648BKW1SS Turn-Key / Ready-To-Use Joints 5500 1-1/4 5/8 3-3/4 1-1/4 5/16-18 NC 3/16 x 3/32 .705 1-1/4
CJ650BKW1SS Turn-Key / Ready-To-Use Joints 9000 1-1/2 3/4 4-1/4 1-11/32 5/16-18 NC 3/16 x 3/32 .832 1-9/16
CJ651BKW1SS Turn-Key / Ready-To-Use Joints 14000 1-3/4 7/8 * 5 1-9/16 5/16-18 NC 3/16 x 3/32 .958 1-7/8
CJ652BKW1SS Turn-Key / Ready-To-Use Joints 22000 2 1 * 5-7/16 1-5/8 3/8-16 NC 1/4 x 1/8 1.109 2-3/16
CJ653BKW1SS Turn-Key / Ready-To-Use Joints 32000 2-1/2 1-1/4 * 7 2-3/32 3/8-16 NC 1/4 x 1/8 1.363 2-13/16
CJ654BKW1SS Turn-Key / Ready-To-Use Joints 55000 3 1-1/2 * 9 2-27/32 1/2-13 NC 3/8 x 3/16 1.663 3-5/16
CJ655BKW1SS Turn-Key / Ready-To-Use Joints 131000 4 2 * 10-5/8 3-1/8 1/2-13 NC 1/2 x 1/4 2.219 4-3/8
  Results 1 - 14 of 14 1