Flexible Couplings and Custom Coupling Capabilities > TINYMITE™ Oldham Shaft Couplings > TINYMITE™ Oldham Shaft Couplings > Item # M201-33  
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Item # M201-33, Size 1 TINYMITE™ Oldham Shaft Coupling

Material and Finishes
  • Hubs - Brass, nickel plated.
  • Centerpieces - Nylon (Others such as Polycarbonate on request.)
  • Clamps - Steel, Zinc plated, yellow iridescent finish per QQZ325B
  • Set Screws - Stainless, headless, cup point, hex socket (Std.), spline socket, or slotted available. Orientation of set-screws with respect to crosspins not maintained except at extra cost.
Appropriate wrenches supplied with each order.

NOTE: Any other bore sizes (including metric) not listed are available promptly at no extra charge.

Specifications  · Features  · WHY OUR COUPLINGS ARE BETTER



Set Screw



Hub 1 Bore Diameter

0.125 Inch

Set Screw Size for Hub 1

Two 4 - 40 @ 120º

Hub 2 Bore Diameter

0.125 Inch

Set Screw Size for Hub 2

Two 4 - 40 @ 120º

Maximum Torque

20 in·oz

Maximum RPM

1200 rpm

Former Product No.


Overall Diameter

1/4 Inch

Maximum Bore

0.125 Inch


7/16 Inch


0.055 oz

Misalignment (Ang.)

3 º

Misalignment (Offset)

1/32 Inch

Maximum Temperature

175 ºF

  • Uniform Velocity
  • Greater Misalignment (5º)
  • No Radial Load
  • Easy Separation
  • Zero Backlash
  • Light Weight/Low Inertia
  • Moderate Torque
  • 6000 Volt Insulation
  • Small Size
  • Torsional Rigidity
  • Low Cost



The function of every flexible coupling is to transmit power or motion control from one rotating shaft to another that is not perfectly aligned, without excessive bearing loads.

But since the requirements for transmitting power are not the same as they are for controlling motion, couplings designed to transmit power might well be unsuitable for motion control and vice versa.

For instance, a resilient coupling made with rubber or springs would work well delivering power because it could absorb vibration and/or shock loads, but would not work well controlling motion. Here's why: In a motion control system, every component in the drive train (including couplings) affects the accuracy of the system by the amount of compliance (Wind-Up), Inertia, Friction, Backlash, etc. - things quite unimportant when transmitting power. A coupling that absorbs vibration must by definition, have Wind-Up, Inertia, or Backlash; whereas a true-motion control coupling must have no Backlash, low Inertia, and very low Wind-Up.

There are many applications, which are extremely sensitive to these factors. Today's encoders, for instance, can discriminate down to a few seconds of arc. (That's the width of a dime seen from 2 miles away) So you see how couplings can affect the success of your design.

Torsional Wind-Up is a very important factor. Notice in the graphs how outstanding RENBRANDT Couplings are.

Other manufacturers offer similar misalignment accommodation and low compliance - BUT NOT IN THE SAME PRODUCT.

The system must also be free from imbalance, vibration, and oscillation in order to prevent hunting - especially in closed-loop systems where a null balance is established between error signals. Since 1951 RENBRANDT has been building and improving Servo Couplings that provide reliability and long life free from maintenance - at moderate cost.

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Renbrandt, Inc. | Flexible Couplings