Can alum dissolve a broken tap?
| Workpiece | Alum works? | Alternative |
|---|---|---|
| Aluminium | Yes, the standard trick | Also: tap extractor with flutes |
| Brass or copper | Partially | Careful heat and a punch |
| Steel | No | Spark eroder, or drill out and fit an insert |
| Cast iron | No | Drill out, thread insert |
Process: dissolve alum powder in hot water until no more will dissolve, suspend the part in it, keep it warm, and top up the water. Check daily — the tap turns to a black sludge you can flush out.
Prevention is cheaper: a broken tap usually means the tap was turned without backing out the chip, or the hole was drilled undersize. Two turns in, half turn back, with cutting fluid.
Tap and Die Set, 40 pcs, metric M3-M12, black oxide — $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 |
|---|---|---|---|
| Tap and Die Set, 40 pcs, metric M3-M12, black oxide | $59 | 40 pcs | 1150 g |
| Tap and Die Set, 40 pcs, metric M3-M12, carbon steel | $65 | 40 pcs | 1150 g |
Order in one step:
POST https://agentkit.ltd/tools/api/order {"product_id":"TD-40B","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 |
|---|---|---|---|
| Tap and Die Set, 40 pcs, metric M3-M12, carbon steel | USD 65.00 | 1150 g | 7-12 days |
| Tap and Die Set, 40 pcs, metric M3-M12, black oxide | USD 59.00 | 1150 g | 7-12 days |