Greenlee
Greenlee 825 4-1/2 in Variable Pitch Hole Saw
Cuts steel with a bi-metal variable-pitch design and 1 5/8 in cutting depth
- Variable-pitch teeth cut steel smoothly
- Bi-metal construction resists wear in steel
- 1-5/8 in max depth handles thick stock
- 7/16 and 1/2 in shank fits common drills
- 4-1/2 in diameter covers large holes
Greenlee 825 Hole Saw for Steel
The Greenlee 825 4-1/2 in variable pitch hole saw cuts steel with a bi-metal tooth design. It accepts 7/16 in and 1/2 in shanks and uses a 1/4 in pilot drill that is 4 1/4 in long. The tool is not impact rated and the arbor is not included. It suits electricians and metalworkers who need clean holes in steel plate.
Thermals Noise and Power Draw
As a hand-tool accessory the saw generates no electrical noise or power draw of its own. Heat builds only at the cutting interface and depends on feed rate and workpiece thickness. The variable 4/6 teeth-per-inch pattern helps evacuate chips and reduces friction during steady drilling. Operators should use cutting fluid to manage temperature and extend tooth life.
Build Fit and Clearances
The 1 5/8 in maximum cutting depth determines how thick a workpiece can be drilled in one pass. A compatible arbor must be sourced separately to match the shank size of the drill or driver being used. The pilot drill centers the cut and clears a path for the saw body. Buyers who need an integrated arbor or impact-rated construction should select a different model.
Highlights
- Variable-pitch teeth cut steel smoothly
- Bi-metal construction resists wear in steel
- 1-5/8 in max depth handles thick stock
- 7/16 and 1/2 in shank fits common drills
- 4-1/2 in diameter covers large holes
Specifications
| Brand | GREENLEE |
|---|
Questions about this item
How do I install the 4-1/2 in hole saw onto my drill?
Fit the saw onto a separate arbor with a 7/16 in or 1/2 in shank, insert the 1/4 in pilot drill, tighten the set screw firmly, then chuck the arbor into the drill.
When will the bi-metal teeth on this 4-1/2 in hole saw need replacement?
Replace the saw when the 4/6 variable-pitch teeth become dull, chipped, or when cutting steel noticeably slows and requires excessive feed pressure.
What limit appears first when cutting steel continuously with this 4-1/2 in hole saw?
The 1 5/8 in maximum cutting depth is reached before the bi-metal teeth overheat, so deep holes require periodic chip clearing.
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