55° Imperial Pipe Thread Mills (G & Rc Series)
55° Imperial Full-Profile Carbide Thread Mills for G-Series (BSPP) Parallel Pipe Threads
Shop premium 55° Imperial Full-Profile Thread Mills for G-Series (BSPP) threads. One-pass threading for high-pressure seals. German carbide & TiAlCN coated. Order now!
55° Imperial Full-Profile Carbide Thread Mills (G-Series / BSPP)
Ensure perfect sealing and high production efficiency with our 55° Imperial Full-Profile Thread Mills. Specifically designed for G-Series (BSPP - British Standard Pipe Parallel) threads, these tools cut the complete thread form—including the crest and the root—in a single helical pass. This ensures 100% thread profile accuracy and the superior surface finish required for leak-proof hydraulic and pneumatic fittings.
Product Function
Specifically engineered for machining internal BSPP (G) parallel pipe threads. Unlike partial profile tools, the full-profile design:
- Completes the Profile: Tops the thread crest and rounds the root simultaneously for a perfect fit.
- Ensures Sealing: Delivers the precise 55° Whitworth form necessary for pressure-tight joints.
- Universal Internal Use: Ideal for high-pressure manifolds, valve bodies, and fluid power components.
Product Features
- Premium German Substrate: Manufactured from ultra-fine grain tungsten carbide (Walter, Germany) for maximum toughness and wear resistance.
- TiAlCN Specialized Coating: Provides high thermal stability and hardness (up to 3000HV), making it suitable for:
- Carbon Steel & Alloy Steel
- Stainless Steel (304, 316)
- Cast Iron & Mold Steel
- One-Pass Efficiency: Full-profile teeth allow you to complete the thread depth in one helical orbit (360°), drastically reducing cycle times.
- Exceptional Rigidity: Optimized shank-to-cutting diameter ratio prevents deflection and ensures thread pitch consistency.
Specifications (Imperial G-Series)
Model (TPID1L1ShankOAL) | Application (G-Thread) | Shank Dia. (D) | Reach (L1) | OAL |
|---|---|---|---|---|
G1/16-28D612LD660L | G 1/16-28 | D6 | 12mm | 60mm |
G1/8-28D612LD660L | G 1/8-28 | D6 | 12mm | 60mm |
G1/8-28D812LD860L | G 1/8-28 | D8 | 12mm | 60mm |
G1/4-19D1026.5LD1075L | G 1/4-19 | D10 | 26.5mm | 75mm |
G3/8-19D1222LD1275L | G 3/8-19 | D12 | 22mm | 75mm |
G1/2-14D1226LD1275L | G 1/2-14 | D12 | 26mm | 75mm |
G3/4-14D1630LD1690L | G 3/4-14 | D16 | 30mm | 90mm |
G1-11D1634LD1690L | G 1-11 | D16 | 34mm | 90mm |
Recommended Cutting Parameters (RPM/Feed)
The following are reference values for TiAlCN coated G-series tools in steel machining.
Workpiece Material | Cutting Speed (Vc: m/min) | Feed per Tooth (fz: mm/t) |
|---|---|---|
Carbon Steel / Soft Steel | 100 - 150 | 0.02 - 0.06 |
Alloy Steel / Mold Steel | 80 - 120 | 0.02 - 0.05 |
Stainless Steel (304/316) | 60 - 90 | 0.015 - 0.04 |
Cast Iron | 90 - 140 | 0.03 - 0.07 |
Promotion Policy
- Bulk Ordering Discounts: Save 10% on 20+ units; 20% on 100+ units.
- Sample Program: Industrial customers can apply for a special trial discount.
- Direct Factory Shipping: 24-hour dispatch for all in-stock G-series sizes.
- Customization: Custom thread lengths or special shanks available upon request.
Client Benefits
- Guaranteed Leak-Free Joints: Full-profile precision ensures your G-threads meet the strictest sealing standards.
- Increased Productivity: One-pass threading means you spend less time per part compared to standard single-point tools.
- Process Safety: Unlike taps, thread mills don't break off in holes, preventing expensive scrap in large valve bodies.
- Lower Inventory Costs: One tool can machine G-threads of the same pitch across different diameters if necessary (e.g., G1/16 and G1/8 share 28 TPI).
FAQ
Q: What is G-Series (BSPP) and how does it differ from NPT?
A: G-series (BSPP) is a British standard parallel pipe thread with a 55° angle. Unlike NPT (which is tapered and has a 60° angle), G-series requires a washer or O-ring for sealing.
Q: Why use a Full-Profile mill instead of a tap?
A: Thread milling offers better chip control, adjustable thread fit, and eliminates the risk of tool breakage ruining a finished part. Full-profile specifically ensures the crest and root are perfectly formed.
Q: Can I use the G 1/4 tool for a larger size?
A: Yes. Since the pitch for G 1/4 and G 3/8 is both 19 TPI, you can technically use the smaller diameter tool to machine a larger hole of the same pitch.
Q: Is coolant required?
A: Yes, we recommend flood coolant or high-pressure air blast to ensure efficient chip evacuation, especially in blind holes.