Taperless Mounting: Plate Preparation Guide
Key Takeaway: Taperless bores use a simple H7 straight bore instead of precision taper reaming — cutting plate machining time by 50%. Total bore preparation: drill + ream to H7. No taper reamer, no angle matching, no pin-specific bore fitting.
Plate Bore Specification
| Parameter | Standard Taper Bore | Taperless Bore |
|---|---|---|
| Bore type | Taper (1:50 or 1:100) | Straight cylinder |
| Tolerance | Matched to specific taper angle | H7 (standard reamer) |
| Tooling required | Specific taper reamer + pin gauge | Standard H7 reamer (any brand) |
| Machining time per bore | 25–30 min | 10–15 min |
| Pin interchangeability | Pin matched to specific bore | Any same-diameter pin fits any bore |
Conversion from Taper to Taperless
Existing taper bores can be converted to straight bores by straight-reaming the tapered bore. The enlarged diameter accepts the next-size taperless pin. Cost: $15–25 per bore. The conversion is permanent — the bore cannot be reverted to taper. Recommended only during scheduled mold maintenance when the mold is already disassembled.