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SAE code 61 vs code 62 vs caterpillar flange size

Date:May 06, 2020

SAE J518 4-bolt hydraulic flanges look quite similar to each other, SAE Code 61, SAE Code 62, and Caterpillar 4-bolt flanges, Komatsu flanges, Poclain flange, demag flange showed small dimensional and physical differences.

 

Installation difference point:

SAE Code 62 (6,000 psi) 4-bolt flange can’t fit an SAE Code 61 (3,000 psi) motor, wrong bolt size position. Otherwise is the same;  

4 bolt position difference for sae code 61 and sae code 62 flange.

Thickness of flange head OD is difference.

 

COMPARATIVE DIMENSIONS FOR 4-BOLT FLANGES

Nominal
flange
size

SAE Code 61 Flange Size

SAE Code 62 Flange SizeCaterpillar Flange Size

Flange
OD

A

B

C

Flange
OD

A

B

C

Flange
OD

A

B

C


1/2

1.188

0.688

1.5

0.265

1.25

0.718

1.594

0.305





5/8

1.338


0.265










3/4

1.5

0.876

1.875

0.265

1.625

0.938

2

0.345|

1.625

0.938

2

0.56

1

1.75

1.03

2.062

0.315

1.875

1.094

2.25

0.375

1.875

1.094

2.25

0.56

1 1/4

2

1.188

2.312

0.315

2.125

1.25

2.625

0.405

2.125

1.25

2.625

0.56

1 1/2

2.375

1.406

2.75

0.315

2.5

1.438

3.125

0.495

2.5

1.438

3.125

0.56

2

2.812

1.688

3.062

0.375

3.125

1.75

3.812!

0.495

3.125

1.75

3.812

0.56

2 3/4

3.312

2

3.5

0.375









3

4

2.438

4.188

0.375









3 1/2

4.5

2.75

4.75

0.442









4

5

3.062

5.125

0.442









5

6

3.624

6

0.442










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