Oldham's couplings

Structure of oldham's couplings

Slider abrasion

Oldham's coupling absorbs mainly parallel misalignment through the slider sliding along its groove. So on condition that there is large parallel misalignment with load torque, abrasion will progress on the slider's groove during each rotation, resulting in an increased backlash. (This is especially true for metal sliders.) If you need to avoid the increase of backlashes on the conditions of large torque and long-term use, you should adjust shafts less misalignment.

Slider fracture

When transmission torque is applied, the part of slider caught between the drive and driven side projections is pushed outward. So a large load torque beyond the elasticity tolerance of slider will cause a deformation of slider, and, eventually, can rupture it in the deformation direction. If the fracture occurs in such a way, it is deemed that the slider has been exposed to an excessive load torque.

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Oldham's couplings product list

Click on the picture to jump to product description.

asj 01

ASJ

Outer diameter 6.2-41
Shaft diameter 1-20
Features

・Combination of stainless steel hub and FRP slider provides excellent sliding performance.
・The tolerance of the parallel misalignment and the torque load is balanced.
・Set screw style.

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asju 01

ASJU

Outer diameter 16-41
Shaft diameter 4-20
Features

・Combination of stainless steel hub and FRP slider provides excellent sliding performance.
・The tolerance of the parallel misalignment and the torque load is balanced.
・Clamp style.

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apj 01

APJ

Outer diameter 12-39
Shaft diameter 3-20
Features

・Combination of stainless steel hubs and an aluminum bronze slider with superior durability.
・Robust, strong coupling capable of shock torque.
・Set screw style.

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apju 01

APJU

Outer diameter 16-41
Shaft diameter 4-20
Features

・Combination of stainless steel hubs and an aluminum bronze slider with superior durability.
・Robust, strong coupling capable of shock torque.
・Clamp style.

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fj 01

FJ

Outer diameter 44-69
Shaft diameter 14-38
Features

・Combination of aluminum hubs and a polyacetal slider with superior durability.
・Large diameter coupling with well-balanced tolerance of parallel axis deviation and torque load tolerance.

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fju 01

FJU

Outer diameter 44-69
Shaft diameter 14-35
Features

・Combination of aluminum hubs and a polyacetal slider with superior durability.
・Large diameter coupling with well-balanced tolerance of parallel axis deviation and torque load tolerance.

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fspj 01

FSPJ

Outer diameter 45-70
Shaft diameter 15-35
Features

・Combination of stainless steel hubs and an aluminum bronze slider with superior durability.
・Robust coupling for large shaft diameters, capable of shock torque.
・Set screw style.

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fspju 01

FSPJU

Outer diameter 45-55
Shaft diameter 15-25
Features

・Combination of stainless steel hubs and an aluminum bronze slider with superior durability.
・Robust coupling for large shaft diameters, capable of shock torque.
・Clamp style.

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ffpj 01

FFPJ

Outer diameter 90-179
Shaft diameter 20-85
Features

・Minimally-sized slider gap covered with a high viscosity resin film to prevent seizure and eliminate backlash.
・Robust coupling for large shaft diameters, capable of shock torque.
・Set screw style.

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