SAE J620 and J621 Details
The information on these data sheets provide general details and are meant to be a guide only, Always request specific installation drawings from your supplier with as built dimensions.
| Dimensions for identification purposes only. | ||||
|---|---|---|---|---|
| SAE Engine Housing Dimensions | ||||
| SAE | ‘ A ” | ‘ B ” | ‘ G ” | |
| SIZE | Dia. | Dia. | Qty. | Size |
| OO | 33.500 | 31.000 | 16 | 1/2” – 13 |
| O | 26.750 | 25.500 | 16 | 1/2 ” – 13 |
| 1/2 | 24.375 | 23.000 | 12 | 1/2” – 13 |
| 1 | 20.875 | 20.125 | 12 | 7/16” – 14 |
| 2 | 18.375 | 17.625 | 12 | 3/8” – 16 |
| 3 | 16.875 | 16.125 | 12 | 3/8” – 16 |
| 4 | 15.000 | 14.250 | 12 | 3/8” – 16 |
| 5 | 13.125 | 12.375 | 8 | 3/8” – 16 |
| 6 | 11.250 | 10.500 | 8 | 3/8” – 16 |
| Dimensions E and F may vary, measure to verify if unknown. | ||||||
|---|---|---|---|---|---|---|
| SAE Engine Flywheel Dimensions | ||||||
| SAE | ‘C’ | ‘D’ | ‘E’ | ‘F’ | ‘H’ | |
| SIZE | Dia. | Dia. | Dia. | Qty | Size | |
| 6 – 1/2 | 8.500 | 7.875 | 1.19 | 2.05 | 6 | 5/16″ – 18 |
| 7 – 1/2 | 9.500 | 8.750 | 1.19 | 2.05 | 8 | 5/16″ – 18 |
| 8 | 10.375 | 9.625 | 2.44 | 2.44 | 6 | 3/8″ – 16 |
| 10 | 12.375 | 11.625 | 2.12 | 2.83 | 8 | 3/8″ – 16 |
| 11 – 1/2 | 13.875 | 13.125 | 1.56 | 2.83 | 8 | 3/8″ – 16 |
| 14 | 18.375 | 17.250 | 1.00 | 3.14 | 8 | 1/2” – 13 |
| 18 | 22.500 | 21.250 | 0.62 | 3.93 | 6 | 5/8″ – 11 |
| 21 | 26.500 | 25.250 | 0.00 | 5.11 | 12 | 5/8″ – 11 |
| 24 | 28.875 | 27.250 | 0.00 | 5.11 | 12 | 3/4″ – 10 |
| Typical Industrial Power Take Off Dimensions | |||||||
|---|---|---|---|---|---|---|---|
| Clutch Size | ‘J’ | ‘K’ | ‘L’ | ‘M’ | ‘S’ | ||
| Ball, Main Bearing | 6 1/2″ & 7 1/2″ | 1.68″ | 1.19″ | 5.56″ | 3.5″ | 1.438″ | |
| Taper Roller Main Bearings | 6 1/2″ & 7 1/2″ | 1.68″ | 1.19″ | 7.06″ | 3.5″ | 1.438″ | |
| Taper Roller Main Bearings | 8″ | 1.44″ | 2.24″ | 7.06″ | 6.0″ | 1.750″ | |
| Taper Roller Main Bearings | 10″ | 1.75″ | 2.12″ | 8.63″ | 5.5″ | 2.250″ | |
| Taper Roller Main Bearings | C111TD | 1.75″ | 2.12″ | 8.63″ | 5.5″ | 2.250″ | |
| Taper Roller Main Bearings | 1P – 11 1/2″ | 2.26″ | 1.56″ | 9.25″ | 6.5″ | 2.250″ | |
| Taper Roller Main Bearings | 2P – 11 1/2″ | 2.31″ | 1.56″ | 9.63″ | 6.5″ | 2.500″ | |
| Taper Roller Main Bearings | 1P – 14″ | 2.82″ | 1.0″ | 12.13″ | 8.5″ | 3.000″ | |
| Taper Roller Main Bearings | 2P – 14″ | 2.82″ | 1.0″ | 13.75″ | 10.0″ | 3.500″ | |
| Taper Roller Main Bearings | 3P – 14″ | 2.82″ | 1.0″ | 14.50″ | 10.0″ | 3.938″ | |
- Certain 7 1/2″ units are available with 1.75″ (‘S’) Diameter Output Shaft
- 10″ Rockford style SAE #3 & #2 Housing Dimension ‘L’ = 9.25″
- 2P 14 Rockford style Dimension ‘L’ = 13.5″
- 2P 14 Rockford style ball main bearing type Dimension ‘L’ = 12.69″