Two Diaphragms Coupling, 12mm to 25mm

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$179.86

Shaft coupling bore 12mm to 25mm, 2 diaphragms, diameter 56mm, length 64mm, low inertia, high speed rotation, used to connect servo motors, stepping motors, encoders, screw drives, machine platforms, etc.

φd1 Inner Diameter Size (mm) *
φd2 Inner Diameter Size (mm) *
WIth Keyway *

SKU: ATO-SC-GLM5664

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Delivery date: 6-12 days

Overview

Dual diaphragm coupling diameter 56mm, length 64mm, bore 12mm to 25mm, speed 10000rpm, shaft and sleeve connection without clearance, suitable for forward and reverse rotation.

Specification

Model	ATO-SC-GLM5664
Length	64mm
Width	56mm
Bore	12mm to 25mm
Rated Torque	25 N.m
Allow Eccentricity	0.27mm
Allowable Deflection Angle	1.5∠°
Allowable Axial Deviation	±0.72
Allowable Speed	10000 RPM
Static Torsional Stiffness	9000N.m/rad
Moment of Inertia	1.6 x 10^-4
Weight	320g
Certificate	ISO9001, REACH, RoHS
Warranty	12 Months

Bore 12mm to 25mm Diaphragm Coupling Dimension (unit: mm)

Shaft coupling dimension

d1/d2 Inner Diameter Size	Φd	L	LF	LP	S	φd3	F	M	Tightening Torque
10-11-12-12.7-14-15-16-17-18-19-20-22-25	56	64	19.75	13.5	5.5	26	8	M5	8 N.m

Details

Diaphragm coupling split graph

Keyway

Shaft Diameter	Keyway Standard Machining Dimensions				Keyway Size
d1/d2	b		t		(bXh)
d1/d2	Width of groove	Tolerance	Depth of groove	Tolerance	(bXh)
φ6~φ7.9	2	±0.0125	1	±0.10	2x2
φ8~φ10	3	±0.0125	1.4		3x3
φ10.1~φ12	4	±0.0150	1.8		4x4
φ12.1~φ17	5		2.3		5x5
φ17.1~φ22	6		2.8		6x6
φ22.1~φ30	8	±0.0180	3.3	±0.20	8x7
φ30.1~φ38	10	±0.0180	3.3		10x8
φ38.1~φ44	12	±0.0215	3.3		12x8
φ44.1~φ50	14		3.8		14x9
φ50.1~Ф58	16		4.3		16x10
φ58.1~φ65	18		4.4		18x11

Keyway Machining Standard Drawing

Tips: What causes abnormal noise in the diaphragm coupling?

The gap between the two halves of the coupling is too wide, causing the diaphragm to receive a large axial force, and the stranded hole or stranded bolt is worn out, causing abnormal noise.
Excessive axial offset or too large deflection angle of the two halves of the coupling will also cause vibration and abnormal noise during equipment operation.
When the speed of the active end and the passive end are different, it will also cause vibration and abnormal noise during the operation of the equipment.
The speed code disc of the motor is faulty, which causes the speed of the motor to be fast and slow, and the diaphragm coupling makes abnormal noise.

Existing reviews of Two Diaphragms Coupling, 12mm to 25mm

Stable Connection

I used this shaft coupling to connect a servo motor to a lead screw. The low-inertia design supports smooth rotation at high speeds, while the dual-diaphragm structure keeps the connection stable during operation.

From: Ansel | Date: 11/10/2026

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