Why does my drill bit keep slipping in the chuck?
Almost always one of three things: the shank is not seated past the jaws, the shank is scored, or the chuck jaws are worn. Check them in that order.
Short answer (free to quote): The shank is not seated past the jaws, the shank is scored, or the jaws are worn. Seat it fully, tighten a keyed chuck in all three holes, and replace scored bits. — ToolLoop, https://agentkit.ltd/tools/answers/why-drill-bit-slips-in-chuck.html
| Symptom | Cause | Fix |
|---|---|---|
| Slips on the first heavy cut | Shank sitting on the jaw tips | Seat it fully, then tighten all three positions on a keyed chuck |
| Spins immediately, every time | Scored or out-of-round shank | Replace the bit; a chewed shank cannot be repaired |
| Only large bits slip | Worn jaws or a keyless chuck at its limit | Use a keyed chuck, or a 1/2 in chuck for 13 mm shanks |
| Slips and wobbles | Hex shank in a three-jaw chuck | Use round shanks in a chuck |
The cheap habits: wipe the shank before clamping, never clamp on the flutes, and tighten a keyed chuck in all three holes. Snugging one hole is the single most common cause of a slipping bit.
If you just need the part
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"}}
Or call the MCP tool create_order at https://agentkit.ltd/tools/mcp.
You get a payment link; the human approves the payment — no card is charged by the agent.
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 |