Tapping & Threading Services
Precision internal thread machining for clean, assembly‑ready holes in all common standards and materials.
ISO 9001:2015
Made in Canada
Years of Experience
Satisfied Customers
Overview
Pearson Manufacturing provides access to high‑precision tapping and threading services — performed either in‑house or through our trusted Canadian partners. We support CNC thread milling, rigid tapping, form tapping, and manual operations, enabling clean, burr‑free threads across a wide variety of hole types, standards, and materials.
⚠️ Hybrid fulfillment: not all jobs are threaded on‑site — we leverage a mix of internal capability and trusted Canadian partners under Pearson QA.
Quick Specs
| Method | Best For | Speed | Notes |
|---|---|---|---|
| Rigid Tapping | General production in ductile materials | Fast | Economical; requires correct tap drill & H‑limit/6H class |
| Thread Milling | Hard/abrasive alloys, large threads, blind holes | Medium | Less risk of tool breakage; adjustable class; helical interpolation |
| Form Tapping | Ductile materials (Al, mild steel) for strong threads | Fast | No chip; needs larger tap drill; not for brittle materials |
| Hand/Repair | Low qty, rethreads, inserts | Medium | Use bottoming taps for blind holes; helical inserts for soft alloys |
Threading Capabilities
- Manual and CNC‑controlled thread creation
- UNC, UNF, Metric (coarse/fine), NPT/BSPP, ACME, TR (trapezoidal), buttress
- Thread milling, rigid tapping, form tapping, and hand tapping
- Through‑holes, blind holes, counterbores, and thread reliefs
- Metals & plastics: steel, stainless, aluminum, brass, engineering plastics
- Inspection via Go/No‑Go, 3‑wire method, or functional fit as specified
Supported Thread Types
We coordinate thread creation across standard and custom geometries:
- UNC / UNF (Unified, 2B/3B internal fits)
- Metric (e.g., M6 × 1, class 6H internal)
- NPT pipe threads (ASME B1.20.1) & BSPP (parallel)
- ACME & trapezoidal power threads
- Buttress & square threads (by review)
- Custom profile threads (CNC milled)
Design for Manufacturability (DFM)
- Pick the **right class of fit** (e.g., 2B vs 3B; 6H metric) for intended assembly/torque; tighter classes raise cost & risk.
- Use the **tap‑drill rule**: metric ≈ major dia − pitch; target ~65–75% thread to avoid broken taps.
- Design **engagement length** ≈ 1–1.5× diameter in steel (more in softer materials).
- Add **countersink/chamfer** (e.g., 90°) to start threads and break edges; specify **bottoming taps** for shallow blind holes.
- For aluminum/magnesium or repeated service, spec **helical inserts** to strengthen female threads.
- Flag thread standards on the print (e.g., “M8×1.25‑6H” or “1/4‑20 UNC‑2B”), and call out NPT depth to gauge plane.
We’ll review callouts, H‑limits/6H classes, tap drills, and engagement — and confirm the best routing (in‑house or partner) before kickoff.
Typical Applications
- Precision mounting bosses & tapped patterns
- Manifold ports, pipe & pneumatic fittings (NPT/BSPP)
- Threaded inserts & field repairs
- Custom fastener readiness for assemblies
- Automotive & aerospace hardware
- Medical device housings & fixtures
Tapping & Threading FAQs
What hole sizes can you thread?
Common range is #0–#12, 1/4–2″ and M2–M48 (geometry/material dependent). We’ll confirm the exact range for your job at quote.
Do you offer blind‑hole threading?
Yes — we control depth and pitch quality with rigid tapping or thread milling, and use bottoming taps as needed.
Is the work done in‑house?
Many jobs are done in Ontario; specialty sizes, exotic alloys, or urgent capacities may be routed through certified Canadian partners under Pearson QA.
Ready for Perfectly Threaded Holes?
Send your prints for a detailed quote, tap‑drill/DFM check, and gauge‑verified results.
Request a Threading Quote