Is WD-40 good enough as cutting fluid?
| Fluid | Aluminium | Mild steel | Stainless |
|---|---|---|---|
| WD-40 | Good | Poor | Poor |
| Motor oil | Acceptable | Acceptable, slow | Poor |
| Tapping fluid / paste | Too heavy | Good | Good |
| Water-soluble coolant | Good | Good | Good, flood it |
What the fluid is actually doing: cooling the edge and preventing the chip from welding to the flute. Extremely thin oils fail at the second job and do nothing at the first when the hole gets hot.
Cheap upgrade: a stick of tapping wax on the bit costs less than a ruined hole and works on steel, stainless and aluminium.
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 |
| Tap and Die Set, 40 pcs, metric M3-M12, black oxide | $59 | 40 pcs | 1150 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 |
| Tap and Die Set, 40 pcs, metric M3-M12, black oxide | USD 59.00 | 1150 g | 7-12 days |