Selection Guide

Coupling Bore Size Selection

Bore mismatch is the most common coupling sizing mistake — check both shaft diameters.

How to determine bore

A coupling has two bores: input (motor shaft) and output (load shaft). Match each bore to its shaft diameter, usually with H7 tolerance.

Keyway vs clamp

Low torque (steppers, encoders) usually use clamp type (no keyway); high torque (servo, spindle) use a keyway for more torque. SAILINK machines keyways and custom bores to your drawing.

Common sizes

SAILINK bore range 3–78 mm: jaw/diaphragm series 3–78 mm, stainless series 9.9–65 mm, steel diaphragm series OD to 190 mm (bore on request).

Bore mismatch is the most common coupling sizing mistake — check both shaft diameters.

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Ordering & delivery

Minimum order
1 pc
Lead time
3 days in stock · 15 days custom
Warranty
6 months
Payment50% deposit, balance before shipment
Bank transferCompany-to-company only, no personal accounts
PackagingCarton, or pallet with wooden case by quantity
CertificationISO 9001

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