BEYOND TR24 Trapezoidal Thread Taps | HSS-Co Cobalt Machine Taps (TR24x2, x3, x4, x5) - Right & Left Hand
TR25 Trapezoidal Thread Tap (3/4/5/6mm Pitch) – 25mm Thread Diameter, HSS Cobalt High-Speed Steel, Left & Right Hand Taps
TR22 Trapezoidal Thread Tap (3/4/5mm Pitch) – HSS Cobalt High-Speed Steel Left/Right Hand Tap, 22mm Thread Diameter
BEYOND TR20 Trapezoidal HSS Thread Taps | TR20x2 TR20x3 TR20x4 TR20x6
BEYOND TR13 Trapezoidal Thread Taps | TR13X2 TR13X3 TR13X4 HSS Metric ACME Taps
BEYOND TR36X6 Trapezoidal Thread Tap | HSS Precision Tr36 x 6 Metric ACME Machine Tap
T18X4 T-Type Thread Machine Tap - High Precision Threading Tool for Metalworking, CNC, and DIY Projects
BEYOND HSS-Co T-Type Machine Tap · ISO Tr · ANSI ACME
T-Type Trapezoidal Machine Taps — Tr8 to Tr36, ACME 1/2-10 / 3/4-6
The BEYOND T-Type machine tap family for ISO metric Trapezoidal (Tr) and ANSI ACME power transmission threads. Forged from premium 5% Cobalt HSS-Co (HSS-E), with multi-stage staggered entry profile for low chip binding and high torque resistance on tough alloy steels.
🟢 Trusted by small workshops, individual machinists & garage CNC users worldwide. 1 piece welcome · WhatsApp reply within 2 hours · 3–7 day global shipping via DHL / UPS / FedEx.
Thread Profile
Tr · ACME
Material
HSS-Co 5%
Size Range
Tr8 – Tr36
Standard
ISO 2908 / ANSI B1.1
BEYOND T-Type Tap Family — 7 Size SKUs
All size tiers are forged from 5% Cobalt HSS-Co (HSS-E), with multi-stage staggered entry profile, available in right & left hand. Diameter range covers Tr13 mini lead screws to Tr36 heavy lead screws.
| Tr Size | Pitch | Price | Typical Use |
|---|---|---|---|
| TR13 | 2/3/4 mm | $18.32 | Mini lead screw, instrument, optical |
| T18 | 4 mm | $32.16 | CNC lead screw, light-duty automation |
| TR20 | 2/3/4/6 mm | $41.89 | Standard lead screw, linear actuator |
| TR22 | 3/4/5 mm | $46.48 | Heavy lead screw, machine tool slide |
| TR25 | 3/4/5/6 mm | $54.81 | Heavy machine tool, large lead screw |
| TR24 | 2/3/4/5 mm | $59.50 | Standard heavy lead screw |
| TR36 | 6 mm | $133.60 | Extreme heavy lead screw, large press |
Imperial ACME 1/2-10 and 3/4-6 available on request — contact WhatsApp for quote.
Trapezoidal (Tr) vs ACME — ISO vs ANSI Standard
Both Trapezoidal and ACME threads are 30° / 30° symmetric power transmission threads for lead screws, machine slides, and clamps. The two standards differ in size designation, tolerances, and pitch range.
| Property | ISO Trapezoidal (Tr) | ANSI ACME |
|---|---|---|
| Standard | ISO 2908 / DIN 103 | ANSI B1.1 / B1.3 |
| Size designation | Tr8×1.5, Tr10×2, Tr16×4, Tr20×4… | 3/4-6, 1/2-10, 1-8, 1.5-6… |
| Profile angle | 30° symmetric | 29° symmetric (slight asymmetry for clearance) |
| Tolerances | e7 (external) / 7H (internal) | Class 2G / 3G |
| Common sizes (BEYOND) | Tr13–Tr36 (full size range) | 1/2-10, 3/4-6 (on request) |
Trapezoidal threads are more common globally (ISO standard, used in EU/CN machinery). ACME is the US equivalent (ANSI standard, used in NA machinery). Both are interchangeable for functional lead screw applications.
HSS-Co (5% Cobalt) — Why It Matters for Tr / ACME
Trapezoidal / ACME taps work under extreme torque loads due to the deep, coarse thread profile. Standard HSS (M2) or HSS-E (M35, 5% Cobalt) tap materials may chip or break on tough alloy steels. The BEYOND T-Type taps use premium 5% Cobalt HSS-Co (HSS-E) for hot hardness up to 600°C.
| Property | HSS-Co 5% (this series) | Standard HSS (M2) |
|---|---|---|
| Hot hardness (600°C) | HRC 60+ | HRC 50 (softens) |
| Alloy steel suitability | Excellent (≤ HRC40) | Limited (chipping on tool steel) |
| Stainless steel | Good (work-hardening resistance) | Poor (rapid wear) |
| Optional TiN coating | Yes (multi-layer) | No (only oxide) |
Cutting Parameter Quick Guide
Tapping is a low-speed operation. Use a tapping head or tension/compression holder for synchronized feed. Use cutting fluid (cutting oil preferred for steel/stainless; kerosene for aluminum).
| Material | Hardness | Vc (m/min) | Tap Drill Ø | Lubricant |
|---|---|---|---|---|
| Carbon Steel (≤1500 N/mm²) | HRC40 | 8–15 | Tr Ø × 0.55 | Cutting oil |
| Alloy Steel / Tool Steel | HRC30 | 5–10 | Tr Ø × 0.50 | Sulfurized cutting oil |
| Stainless Steel (SUS304/316) | HRC40 | 5–10 | Tr Ø × 0.55 | Sulfurized cutting oil |
| Aluminum / Copper / Alloy | HRC40 | 15–25 | Tr Ø × 0.55 | Kerosene or MQL |
| Cast Iron | HRC40 | 10–18 | Tr Ø × 0.55 | Dry or MQL |
For Individual Buyers & Small Workshops
You don't need to be a factory buyer. We ship 1 piece to your home, garage, or workshop — no MOQ, no pre-approval, no corporate paperwork. Perfect for one-off lead screws, CNC conversions, linear actuator builds, and student projects.
💰 Volume Discounts (auto at checkout)
- 1 piece — list price ($18–$134)
- 2–9 pieces — 6% OFF
- 10+ pieces — 12% OFF
📦 Shipping & Delivery
- Shipped from Hangzhou, China
- DHL / UPS / FedEx — 3–7 days to most countries
- Tracked & insured; signature on delivery
💬 Pre-Sale Technical Support
- WhatsApp reply within 2 hours (workdays)
- Email reply same business day
- Chinese & English supported
🎓 Perfect For
- Garage CNC lead screw conversion
- Linear actuator builds (3D printer, plasma, etc.)
- Engineering students & capstone projects
- Old machine tool repair & re-screwing
Not sure which Tr size / pitch? Send us your shaft diameter + load on WhatsApp — we'll recommend a size within 2 hours.
T-Type Tap vs Other Tooling Families
A T-Type tap is a thread-cutting tool, not a hole-making tool. For hole making, see the HRC60 3D / 5D / 8D carbide drill family. For center holes (lathe setup), see the center drill family. All siblings share the same /collections/drill parent hub.
SP Insert Drills — 55° positive trigon (stainless / aluminum / mild steel)
WC Insert Drills — 80° trigon negative rake (steel / cast iron / high MRR)
Application Spotlight
CNC Lead Screw Conversion
Convert a manual milling machine to CNC by replacing the Acme-threaded screws with T-Type lead screws. Trapezoidal threads have less backlash than Acme.
3D Printer / Linear Actuator
DIY 3D printer Z-axis or hobby linear actuator using Tr8×1.5 or Tr10×2 lead screw. Pair with bronze or polymer nut for low-friction motion.
Lathe Lead Screw Repair
Re-cut worn or damaged lead screws on old engine lathes. The 60° ACME / 30° Tr profile is the standard for lathe power feed.
Clamp & Vise Mechanism
Heavy-duty clamping mechanisms (machine vises, fixture clamps) using Trapezoidal threads for high load capacity with low wear.
Press Tooling
Stamping press adjustments, die set screws, and injection mold clamp rings — all standard Trapezoidal / ACME applications.
Educational Projects
Mechanical engineering student projects, robotics lead screws, hobby linear motion — Trapezoidal threads are the standard textbook example.
Ordering Guide — Trapezoidal vs ACME
| Use Case | Recommended Size | Price |
|---|---|---|
| Mini lead screw / instrument | TR13 (Tr13×2/×3/×4) | $18.32 |
| CNC conversion, 3D printer | T18×4 or TR20 (Tr20×2/×3/×4) | $32.16 / $41.89 |
| Standard machine tool lead screw | TR22 / TR25 | $46.48 / $54.81 |
| Heavy machine tool slide | TR24 (Tr24×2/×3/×4/×5) | $59.50 |
| Extreme heavy / large press | TR36×6 | $133.60 |
| Imperial ACME (US standard) | 1/2-10, 3/4-6 (on request) | Contact WhatsApp |
| For through-holes (drill, not tap) | Use HRC60 3D / 5D / 8D drill family | $50–$650+ |
| For center holes (lathe setup) | Use A & B Type center drill | $28 / $37 |
Frequently Asked Questions
What's the difference between ISO Trapezoidal (Tr) and ANSI ACME?
Both are 30° symmetric power transmission threads. ISO Trapezoidal (Tr) is the global standard (ISO 2908 / DIN 103), designated Tr Ø × pitch (e.g., Tr20×4). ANSI ACME is the US standard (ANSI B1.1), designated diameter-tpi (e.g., 3/4-6). They are functionally interchangeable for lead screw applications. The BEYOND T-Type series covers Tr13–Tr36; ACME sizes (1/2-10, 3/4-6) available on request.
Why HSS-Co (5% Cobalt) for Trapezoidal taps?
Trapezoidal / ACME taps work under extreme torque loads due to the deep, coarse thread profile. Standard HSS (M2) softens above 550°C — it can't sustain the heat of cutting deep Trapezoidal threads in tough alloy steels. 5% Cobalt HSS-Co (HSS-E) maintains HRC 60+ hardness at 600°C, preventing chipping and breakage on tough materials.
What tap drill size for Trapezoidal threads?
The tap drill (core hole) diameter is approximately Tr Ø × 0.55 for soft materials (aluminum, mild steel) and Tr Ø × 0.50 for harder materials (alloy steel, tool steel). For Tr20×4, use tap drill Ø 11.0 mm (steel) or 11.4 mm (aluminum). For Tr36×6, use tap drill Ø 19.8 mm. See the carbide drill family for suitable tap drills.
📦 Do you ship to my country? How fast?
Yes — we ship globally from Hangzhou, China via DHL / UPS / FedEx. Standard transit is 3–7 business days to most countries in North America, Europe, Asia-Pacific, and the Middle East. Shipping cost is calculated at checkout based on weight and destination; tracking number is emailed within 24 hours of dispatch.
🛒 Can I order just 1 piece? Is there a minimum order?
Yes — no MOQ. Order 1 piece at $18.32–$133.60 list price, 2–9 pieces at 6% OFF (auto-discount at checkout), 10+ pieces at 12% OFF. Whether you're converting one CNC, repairing one lathe, or building one linear actuator, you're welcome.
↩️ What's your return / refund policy?
Unopened, unused stock can be returned within 7 days of delivery for a full refund (buyer pays return shipping). Defective or wrong items are replaced at our cost. WhatsApp us with your order number and a photo — we respond within 2 hours on workdays.
Need a Custom Tr / ACME Size or Bulk Quote?
BEYOND engineers respond same-day for Trapezoidal / ACME tap specs, custom sizes (Trapezoidal Tr8–Tr60, ACME 1/4-16 to 2-4), and bulk pricing for 10+ pieces (12% off). Reach our team on WhatsApp or email — we ship from Hangzhou via DHL / UPS / FedEx with 3–7 day transit to most countries.
💬 Chat on WhatsApp · +86 15990663752 Email · chao@cnchome-beyond.com
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