SAE Housing & Flywheel Dimensions
Below are listed standard Society of Automotive Engineers (SAE) adaptation configurations. This configuration allows easy coupling to most diesel and gas engines which follow the same SAE standards. The following graphic shows the typical configuration and their respective SAE denomination:
To determine the SAE adaption in your specific application, simply match dimensions XD, XB, XE, XF and XG to arrive at a combination of SAE adaptations for the engine housing and for the engine flywheel, i.e.: SAE#1 Flywheel Housing with SAE#14 Flywheel.
Engine Flywheel Housing Dimensions
| SAE No. | XD | XB | Tapped Holes Qty. | Size |
| 00 | 31.000 (787) | 33.50 (851) | 16 | 1/2-13 |
| 0 | 25.500 (648) | 26.75 (679) | 16 | 1/2-13 |
| 1/2 | 23.000 (584) | 24.38 (619) | 12 | 1/2-13 |
| 1 | 20.125 (511) | 20.88 (530) | 12 | 7/16-14 |
| 2 | 17.652 (448) | 18.38 (467) | 12 | 3/8-16 |
| 3 | 16.125 (410) | 16.88 (429) | 12 | 3/8-16 |
| 4 | 14.250 (362) | 15.00 (381) | 12 | 3/8-16 |
| 5 | 12.375 (314) | 13.12 (333) | 8 | 3/8-16 |
| 6 | 10.500 (267) | 11.25 (283) | 8 | 3/8-16 |
Dimensions in inches (millimeters)
Engine Flywheel Dimensions
| SAE No. | XE | XF | XG | Tapped Holes Qty. | Size |
| 21 | 26.500 (673) | 25.25 (641) | 0 (0) | 12 | 5/8-11 |
| 18 | 22.500 (572) | 21.38 (543) | .62 (16) | 6 | 5/8-11 |
| 14 | 18.375 (467) | 17.25 (438) | 1.00 (25) | 8 | 1/2-13 |
| 11-1/2 | 13.875 (352) | 13.12 (333) | 1.56 (40) | 8 | 3/8-16 |
| 10 | 12.375 (314) | 11.62 (295) | 2.12 (54) | 8 | 3/8-16 |
| 8 | 10.375 (264) | 9.62 (244) | 2.44 (62) | 6 | 3/8-16 |
| 7-1/2 | 9.500 (241) | 8.75 (222) | 1.19 (30) | 8 | 5/16-18 |
| 6-1/2 | 8.500 (210) | 7.88 (200) | 1.19 (30) | 6 | 5/16-18 |
| Delco 17.75 | 17.755 (451) | 15.50 (394) | .72 (18) | 8 | 5/8-11 |
| Delco 15.50 | 15.500 (394) | 13.88 (353) | .72 (18) | 8 | 5/8-11 |
| Delco 12.75 | 12.750 (324) | 11.00 (279) | 0 (0) | 4 | 1/2-13 |
Dimensions in inches (millimeters)
