Conduit bender deduct chart
The deduct (also called take-up) is how much less than the stub length the mark for a 90 goes: subtract it from the stub length, mark the conduit that far from its end, and line the mark up with the arrow.
Typical deducts for EMT on a hand bender
| Size | Deduct |
|---|---|
| 1/2" EMT | 5" |
| 3/4" EMT | 6" |
| 1" EMT | 8" |
| 1-1/4" EMT | 11" |
Hand benders
How to use the deduct
Stub length − deduct = where the mark goes, measured from the end. For a 12" stub with a 5" deduct, mark the conduit at 7", line the mark up with the arrow, and bend to 90°.
Mechanical, electric and hydraulic benders
Each has its own shoes and numbers. Open a bender for its radius, deduct and gain by size.
- Current Tools 750 / 751 (Chicago bender, rigid and IMC)mechanical
- Gardner Bender Sidewinder (Mechanical, Chicago-style)mechanical
- Greenlee 1800 / 1801 (Mechanical, rigid and IMC)mechanical
- Greenlee 1818 (Mechanical)mechanical
- Current Tools 77 Series (Multi-shoe)electric
- Current Tools 77 Series (Single shoe)electric
- Current Tools 747 Omni (Combo shoe)electric
- Gardner Bender Electric Sidewinder (Multiple 180° shoes)electric
- Gardner Bender B2000 Cyclone (Large combo shoe)electric
- Greenlee 555 (Multi-shoe)electric
- Greenlee 555 (Multi-shoe, PVC-coated rigid)electric
- Greenlee 555 (Single shoe)electric
- Greenlee 555 (Single shoe, PVC-coated rigid)electric
- Greenlee 555 (Combo shoe)electric
- Greenlee 854DX (Large combo shoe)electric
- Greenlee 855GX (Standard shoe)electric
- iToolco B2 Rapid Fire (Large combo shoe)electric
- Current Tools 254 (Hydraulic table bender)hydraulic
- Gardner Bender Ultra Eegor (Hydraulic table bender)hydraulic
- Gardner Bender B300 series one-shot (Rigid-only hydraulic table bender)hydraulic
- Greenlee 882 (Hydraulic, Flip-Top)hydraulic
- Greenlee 881 (Hydraulic, Cam Track, one-shot 90° shoes)hydraulic
- Greenlee 884 / 885 (Hydraulic, rigid only)hydraulic
- Southwire Maxis MHB4000 (Hydraulic, 2-1/2 to 4)hydraulic
Common questions
What is the deduct for 1/2" EMT?
5" on most hand benders. Check the number cast on your bender’s head: it’s the one to trust.
What is the deduct for 3/4" EMT?
6" on most hand benders. Check the number cast on your bender’s head: it’s the one to trust.
What is the deduct for 1" EMT?
8" on most hand benders. Check the number cast on your bender’s head: it’s the one to trust.
What is the deduct for 1-1/4" EMT?
11" on most hand benders. Check the number cast on your bender’s head: it’s the one to trust.
Get the marks for your bender
BendMate works this out from your bender’s radius and deduct, flags a bend that won’t work, and shows you every mark.