Custom Carbide Drill Manufacturer in China: OEM RFQ Guide
A practical RFQ guide for buyers sourcing custom carbide drills from China, including drawings, tolerances, coolant holes, coatings, MOQ and lead-time questions.
Custom carbide drills are not just non-standard diameters. Buyers often need a step drill, flat-bottom drill, coolant-through drill, micro drill, long drill, special point angle, private-label marking or coating chosen for a specific work material. A good RFQ makes the difference between a fast quote and several days of clarification.
Custom drill examples and RFQ entry points
Browse custom carbide drill, reamer and end mill examples before sending a drawing.
Learn when a step drill can reduce tool changes and improve diameter-to-diameter coaxiality.
Share drawings, work material, tolerance, coating and annual quantity for a factory-direct quote.
Custom carbide drill types buyers request
| Custom drill type | Typical reason | Critical RFQ detail |
|---|---|---|
| Step carbide drill | Multiple diameters in one tool and fewer tool changes | Step diameters, step length, chamfer/radius and coaxiality requirement |
| Flat-bottom carbide drill | Blind holes, counterbores and flat-bottom features | Point geometry, bottom finish and whether coolant holes are needed |
| Coolant-thru carbide drill | Deep holes, chip evacuation and heat control | Depth ratio, coolant pressure, flute length and work material |
| Micro carbide drill | Small holes in precision parts | Runout, holder type, coating and minimum order quantity |
| Private-label drill | Distributor or OEM brand supply | Laser marking, packaging, batch traceability and repeat-order rules |
RFQ checklist for faster quotes
- 2D drawing or 3D model, plus any reference tool currently used.
- Workpiece material, hardness, machine type and coolant condition.
- Diameter tolerance, hole depth, surface finish and runout requirement.
- Coating preference or cutting problem to solve: wear, chipping, built-up edge or chip clogging.
- Trial quantity, target price range, annual usage and packaging/marking requirements.
How to avoid bad custom drill samples
- Do not quote only from a photo when the tool has steps, coolant holes or tight tolerance.
- Confirm whether the supplier controls grinding, inspection and coating or outsources key steps.
- Ask for first-article inspection details before repeating an annual order.
- Keep sample feedback specific: hole size, burr, chip shape, wear pattern, noise and tool life.
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