Can a worn bit shank be the reason my chuck slips?
| Nominal shank | Healthy | Replace |
|---|---|---|
| 1/4 in (6.35 mm) | 6.33-6.35 mm | Under 6.30 mm |
| 8 mm | 7.98-8.00 mm | Under 7.95 mm |
| 1/2 in (12.70 mm) | 12.68-12.70 mm | Under 12.62 mm |
| 6 mm | 5.98-6.00 mm | Under 5.95 mm |
How a shank wears: spinning in a loose chuck, gauling against hardened jaws, and rust pits. Each episode removes a few hundredths of a millimetre, and once the shank is out of round it will always slip.
Also check for out of round: measure at three points around the shank. A spread of more than 0.02 mm means the shank is oval and the bit belongs in the scrap bin, not the chuck.
Cobalt Drill Bit Set, 13 pcs, M35, imperial, metal case — $59
Price includes US duty, international shipping and customs clearance. In stock. Dispatched within 48 hours. Delivered in 7–12 days, tracked. 14-day returns, we pay return shipping. No US state sales tax collected.
| Product | Price | Pieces | Weight |
|---|---|---|---|
| Cobalt Drill Bit Set, 13 pcs, M35, imperial, metal case | $59 | 13 pcs | 247 g |
| Cobalt Drill Bit Set, 51 pcs, HSS-Co, metal case | $69 | 51 pcs | 620 g |
Order in one step:
POST https://agentkit.ltd/tools/api/order {"product_id":"DB-13M","qty":1,"buyer":{"country":"US"}}
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Options we stock
| Product | Price (duty and shipping included) | Weight | Delivery |
|---|---|---|---|
| Cobalt Drill Bit Set, 13 pcs, M35, imperial, metal case | USD 59.00 | 247 g | 7-12 days |
| Cobalt Drill Bit Set, 51 pcs, HSS-Co, metal case | USD 69.00 | 620 g | 7-12 days |