Greenlee 1800 / 1801 (Mechanical, rigid and IMC): radius, deduct and gain
The Greenlee 1800 / 1801 (Mechanical, rigid and IMC) is a mechanical bender for rigid (RMC) and IMC, 1/2" to 1-1/2". These are the numbers BendMate uses for each of its shoes.
Specs by shoe
| Size | Centerline radius | Deduct | Gain | Notes |
|---|---|---|---|---|
| 1/2" RMC | 2 5/8" | 5 1/2" | 1 15/16" | Gain worked out from the radius. 1800. This radius is below the NEC 4 in minimum; Greenlee says to bend 1/2 in the 3/4 position to meet code, but prints no deduct for that. |
| 3/4" RMC | 4 5/8" | 8 1/2" | 3 1/16" | Gain worked out from the radius. 1800. |
| 1" RMC | 5 7/8" | 11" | 3 13/16" | Gain worked out from the radius. 1800. |
| 1/2" IMC | 2 5/8" | 5 1/2" | 1 15/16" | Gain worked out from the radius. 1800. This radius is below the NEC 4 in minimum; Greenlee says to bend 1/2 in the 3/4 position to meet code, but prints no deduct for that. |
| 3/4" IMC | 4 5/8" | 8 1/2" | 3" | Gain worked out from the radius. 1800. |
| 1" IMC | 5 7/8" | 11" | 3 13/16" | Gain worked out from the radius. 1800. |
| 1-1/4" RMC | 8" | 13 5/8" | 5 1/16" | Gain worked out from the radius. 1801. The 2019 catalog gives 8-1/16 for this radius. |
| 1-1/2" RMC | 9 5/8" | 15 5/8" | 6" | Gain worked out from the radius. 1801. The 2019 catalog gives 9-11/16 for this radius. |
| 1-1/4" IMC | 8" | 13 5/8" | 5 1/16" | Gain worked out from the radius. 1801. The 2019 catalog gives 8-1/16 for this radius. |
| 1-1/2" IMC | 9 5/8" | 15 5/8" | 6" | Gain worked out from the radius. 1801. The 2019 catalog gives 9-11/16 for this radius. |
Marks on the shoe
- 1Front edge of the hookLine your marks up here. This is the arrow the app’s marks are for.
The angle is read with the pointer on the degree scale.
Where the numbers come from
Bend with the Greenlee 1800 / 1801 (Mechanical, rigid and IMC) in BendMate
Choose it in the app and every mark comes from these numbers. Edit any of them to match your own bender.
Common questions
What is the deduct for 1/2" RMC on the Greenlee 1800 / 1801 (Mechanical, rigid and IMC)?
5 1/2". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 2 5/8" and its back-of-90 gain is 1 15/16".
What is the deduct for 3/4" RMC on the Greenlee 1800 / 1801 (Mechanical, rigid and IMC)?
8 1/2". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 4 5/8" and its back-of-90 gain is 3 1/16".
What is the deduct for 1" RMC on the Greenlee 1800 / 1801 (Mechanical, rigid and IMC)?
11". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 5 7/8" and its back-of-90 gain is 3 13/16".
What is the deduct for 1/2" IMC on the Greenlee 1800 / 1801 (Mechanical, rigid and IMC)?
5 1/2". Subtract it from the stub length to find where to mark a 90. The shoe’s centerline radius is 2 5/8" and its back-of-90 gain is 1 15/16".
Brand and model names only identify the bender. BendMate isn’t affiliated with or endorsed by Greenlee. Check the numbers against the markings on your own bender.