Irwin Tools 585-54009 9-piece bolt extractor set pneumatic accessory
- Drill Bits
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High-speed steel drill bit with a 118-degree point angle for general-purpose drilling
This Westward accessory is a Silver and Deming drill bit made from high speed steel with a black oxide finish. It has a reduced shank and a drill bit size of 21/32 in. The point angle measures 118 degrees for general-purpose drilling tasks. Model number 4UM68 identifies this specific power tool accessory.
This bit suits users drilling large-diameter holes in metal where a 21/32 in size is required and a reduced shank fits the chuck. Buyers needing a different diameter, a standard shank, or a split point for self-centering should look at other options. The high speed steel construction handles typical machining but is not designed for hardened steel or abrasive non-metallic materials.
The 21/32 in drill bit size is the single specification that determines whether this is the correct part for the hole you must produce. Verify the required hole diameter against this measurement before purchase. An incorrect size cannot be corrected by the reduced shank or the 118 degree point angle.
Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.
| Product | |
|---|---|
| Brand name | Westward |
| Model name | 4UM68 |
| Product type | Drill Accessories |
| Size & build | |
| Main material | High speed steel |
Open the chuck fully, insert the reduced shank until it seats, then tighten evenly; the step most people miss is centring the bit before the final lock.
Replace when the point no longer self-centres or produces discoloured chips; black oxide finish wears first, then the cutting edges dull.
Heat buildup in the high speed steel is the first limit; pause to let the bit cool and clear swarf to avoid temper loss.
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