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Longmont Facility • SPI Certified

Certified SPI diamond polishing and precision bench finishing

Engineering exact micro-inch surface finishes and critical parting-line integrity for injection mold builders and tool makers across North America.

A-1 to D-3

SPI Standard Ranges

Zero

Parting Line Wash-Out

100%

Hand-Stoned in Colorado

Quantitative Metrics

Tolerances held on critical core and cavity inserts

0.0001"

Dimensional control

SPI A-1

Diamond grade finish

24hr

Expedited turn evaluation

100%

EDM scale removal

Read Specs
Read Specs
Read Specs
Bench Finishing Processes

Specialized core and cavity insert preparation

Eliminating tool-release friction and micro-burrs before production runs.

Diamond Micro-Lapping

Parting Line Integrity

EDM Recast Layer Removal

Achieving mirror finishes up to SPI A-1 standards on hardened tool steels from P20 to S7 and stainless alloys.

Hand stoning and mechanical lapping designed to protect sharp shut-offs without washing out parting lines.

Complete removal of hardened recast layers, micro-pitting, and surface scale from intricate cavity details.

Request Tooling Quote

Submit tooling specs and target Ra values for immediate turnaround

Send your step files and steel grades directly to our Longmont facility for technical evaluation and firm pricing.