Specifications Catalog No. GC GC-I Precision grade JIS B 1702 grade 5 JIS B 1702 grade 5 Gear teeth Standard full depth (w/Crowning) Standard full depth Pressure angle 20 20 Material S45C (Carbon steel) S45C (Carbon steel) Heat treatment Induction hardened teeth Induction hardened teeth Surface hardness HRC 4853 HRC 4853 Surface treatment Unichromic plating Unichromic plating Surface finish Cut Cut Datum reference surface for gear cutting Bore Outside diameter

Gear Couplings

Catalog No.		AH7	B	C	D	E	F	G	H	I	Screw	Keyway	Gear		Shape	Allowable torque (kgfm)	Allowable torque (Nm)	Backlash (mm)	Weight (kgf)	Catalog No.
												WidthDepth	Module	No. of teeth		Bending strength	Bending strength
Outer ring	GC1-I	-	-	-	68	-	-	25	-	-	-	-	2	25	T1	-	-	0.40.6	0.4	GC1-I
Inner hubs	GC1-12S* [ DXF|DWG| 3D CAD] GC1-20 [ DXF|DWG| 3D CAD] GC1-22 [ DXF|DWG| 3D CAD] GC1-25 [ DXF|DWG| 3D CAD]	12 20 22 25	45	3	-	73	24	-	35	- 10 10 10	- M5 M6 M6	- 52.3 73 73	2	25	T2	- 7 10 14	- 68.65 98.07 137.3	0.40.6	0.4 0.35 0.35 0.32	GC1-12S GC1-20 GC1-22 GC1-25
Outer ring	GC2-I	-	-	-	105	-	-	36		-	-	-	2	40	T1	-	-	0.40.6	1	GC2-I
Inner hubs	GC2-20S* [ DXF|DWG| 3D CAD] GC2-30 [ DXF|DWG| 3D CAD] GC2-32 [ DXF|DWG| 3D CAD] GC2-35 [ DXF|DWG| 3D CAD] GC2-40 [ DXF|DWG| 3D CAD]	20 30 32 35 40	70	5	-	115	39.5	-	55	- 13 13 13 13	- M6 M10 M10 M10	- 73 103.3 103.3 103.3	2	40	T2	- 25 30 40 50	- 245.2 294.2 392.3 490.3	0.40.6	1.7 1.4 1.4 1.3 1.3	GC2-20S GC2-30 GC2-32 GC2-35 GC2-40
Outer ring	GC3-I	-	-	-	145	-	-	48	-	-	-	-	2.5	42	T1	-	-	0.40.6	3.2	GC3-I
Inner hubs	GC3-20S* [ DXF|DWG| 3D CAD] GC3-45 [ DXF|DWG| 3D CAD] GC3-50 [ DXF|DWG| 3D CAD]	20 45 50	90	5	-	135	43.5		65	- 20 20	- M10 M10	- 123.3 123.3	2.5	42	T2	- 80 90	- 784.5 882.6	0.40.6	3 2.8 2.6	GC3-20S GC3-45 GC3-50

CAUTION:: S* denotes minimum bore products. Please note Inner hubs come with snap rings and set screws.

NOTE: The allowable torques in the table are obtained from the strength of the keyways. All dimensions shown in the above table(s) are listed in millimeters unless otherwise specified.

Ordering Gear Couplings

(Example) In order create a complete coupling, you will need one GC2-I (outer ring) and two GC2-30 (inner hubs). These components may be mixed (one hub GC2-30 & one hub GC2-40) to meet your bore requirements. There are many ways to couple shafts to transmit power. We have developed these standardized gear couplings of our own design. They are easier to connect or disconnect than chain couplings and are especially suited for use in power testing devices.

Characteristics of Gear Couplings

• The gear teeth of the inner hubs are crowned to allow for up to 5 of shaft angle offset.
• Due to induction hardening of the gear teeth, these couplings have excellent durability. All surfaces except the bore and keyway are plated.
• The units are machined complete with keyways, set screw holes and finished bores and are ready for immediate installation. We also offer minimum bore models for users who want to perform their own secondary operations.

 

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