Stainless Double Turnkey

Stainless Double Turnkey

Curtis double joints are available in 14 sizes, and share all of the advantages of Curtis single U-joints. Features include:

  • Turn-Key Hubs have standard bores, keyways (58″ joints and larger) and set screws already installed
  • Material is 303 grade stainless steel
  • Extra angularity allows standard units to operate at angles up to 70°.
  • Quick and easy TakeApart™ design for easy and economical disassembly and reassembly, with no special tooling required.
  • Firm, positive lockup of the entire assembly thanks to Curtis’ exclusive Tell-Tale Lock Ring.
  • Built-in lubrication passages with Curtis’ exclusive internal lubrication system.
  • Lubrication covers (boots) available in all sizes to retain lubrication and keep out contaminants, extending the life of the joint. Curtis Joints do not require grooves on hubs to retain boots.
  • Easy machinability due to Curtis’ soft hubs.
  • Smooth operations and longer life assured by close and well-controlled tolerances between mating parts and Curtis’ built-in lubrication system.
  • Perfect concentricity with hubs ground on center and centering holes provided on solid hubs to aid in machining.

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

  • Concert Stages
  • Animated Characters
  • Conveyor Equipment
  • Clean Room Robotics
  • Hospital Equipment

Joints 78 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.

Also available in alloy steel.

NOTE #1: Large bearing pin is provided with an oil passage. 1.00" through 4.00" diameter joints are also fitted with a ball spring oil fitting to retain lubricant.

NOTE #2: Curtis standard double universal joints will operate through angles of 70. For applications requiring greater angles, special design can be employed, enabling the joint to operate at angles up to 90.

Catalog
Number
Outside
Diameter
Bore
Diameter
Total
Length
Centerline
to
Centerline
Dimension
Centerline
to
End
Set
Screw
Size
Keyway
Size
Static
Torque
Rating
 Commercial ToleranceInch Pounds
ABCEF/2HI
SS641DB1SS0.3750.18752.4370.6880.3442-56 NC----100
SS642DB1SS0.5000.25002.8130.8130.3754-40 NC----375
SS643DBKW1SS0.6250.31253.2501.0000.40610-32 NF0.094 X 0.047610
SS644DBKW1SS0.7500.37503.8131.1250.48410-32 NF0.094 X 0.0471000
SS645DBKW1SS0.8750.43754.3751.3750.51610-32 NF0.094 X 0.0471350
SS646DBKW1SS1.0000.50004.8751.5000.5941/4-20 NC0.125 X 0.0631900
SS647DBKW1SS1.1250.56255.1251.6250.6091/4-20 NC0.125 X 0.0632200
SS648DBKW1SS1.2500.62505.6251.8750.6255/16-18 NC0.188 X 0.0943600
SS650DBKW1SS1.5000.75006.5632.3130.6725/16-18 NC0.188 X 0.0947200
SS651DBKW1SS1.7500.87507.7502.7500.7815/16-18 NC0.188 X 0.09410700
SS652DBKW1SS2.0001.00008.6253.1880.8133/8-16 NC0.250 X 0.12515500
SS653DBKW1SS2.5001.250011.0634.0631.0473/8-16 NC0.250 X 0.12521000
SS654DBKW1SS3.0001.500013.8134.8131.4221/2-13 NC0.375 X 0.18834000
SS655DBKW1SS4.0002.000017.0006.3751.5631/2-13 NC0.500 X 0.25081000