SANHAN 22ER Trapezoidal Threading Inserts SMX35 4TR 5TR 6TR Turning
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SANHAN 22ER External ISO Trapezoidal (TR) Threading Inserts (SMX35 Gray Grade)
Heavy-Duty Laydown Carbide Thread Turning Inserts | Size 22ER (IC 1/2" / 12.7mm) | Metallic Gray TiAlN PVD Coating for Steel & Stainless Steel
1. Product Overview
Which external threading insert grade is best suited for machining heavy-duty ISO Trapezoidal (TR) ACME lead screws on carbon steel, alloy steel, and tough stainless steel under medium-to-high speed CNC turning conditions?
The SANHAN 22ER Series (SMX35 Grade) is an industrial-grade laydown indexable carbide threading insert engineered specifically for external ISO Metric Trapezoidal (DIN 103 / ISO 2901) thread turning on steel and stainless steel workpieces. Built on a heavy-duty Size 22ER (IC 1/2" / 12.7mm) triangular substrate, this product line covers large coarse pitches including 4.0mm (Tr4.0), 5.0mm (Tr5.0), and 6.0mm (Tr6.0). Featuring SANHAN’s high-performance SMX35 metallic gray Titanium Aluminum Nitride (TiAlN) multi-layer PVD coating grade, these inserts utilize a sub-micrograin carbide substrate that delivers exceptional fracture toughness, thermal crack resistance, and flank wear resistance during heavy load cutting. Combined with precision ground rake face chipbreakers, SMX35 guarantees smooth chip evacuation, prevents work hardening, and ensures strict pitch diameter tolerance adherence.
ISO / ANSI Tool Designation Code Breakdown
(1/2" / 12.7mm)
(External / OD)
(Right Hand)
(5.0mm Pitch TR)
(Gray TiAlN)
- 22: Inscribed Circle (IC) size 1/2" (12.7mm nominal IC width, 22mm edge length for maximum rigidity on large threads).
- E: External thread machining designation (OD turning on shafts, lead screws, and lead spindles).
- R: Right-hand execution for standard CNC lathe forward spindle rotation (M03).
- 4.0TR / 5.0TR / 6.0TR: Trapezoidal DIN 103 / ISO 2901 profile with 30° included flank angle. Full-profile tops thread crest and root simultaneously.
- SMX35: Sub-micrograin PVD TiAlN multi-layer metallic gray coated grade optimized for medium-to-high speed turning on carbon steel, alloy steel, and stainless steel.
2. Key Features
- SMX35 Multi-Layer TiAlN Coating: Metallic gray PVD coating offers superior thermal oxidation resistance up to 900°C, preventing edge cratering under heavy chip loads.
- Sub-Micrograin Carbide Core: Balanced grain matrix engineered for elevated fracture toughness, preventing micro-chipping during interrupted cuts or heavy pitch depth passes.
- Full-Profile Trapezoidal Precision: Forms complete 30° ISO Metric Trapezoidal threads (Tr4, Tr5, Tr6) without burrs, matching Acme/lead screw mating requirements.
- Dual ISO P/M Material Compatibility: Performs across carbon steel, alloy steel, tool steel, and austenitic/martensitic stainless steels.
- Heavy IC 1/2" Laydown Mounting: Standard 22ER dimension delivers high rigidity against axial cutting forces during large-pitch lead screw generation.
3. Technical Specifications & Recommended Parameters
Available Model Variants (Metric & Imperial Specifications)
| Insert Model | Profile Type | Metric Pitch (P) | Imperial Pitch Equivalent (TPI) | Grade & Coating Color |
|---|---|---|---|---|
| 22ER 4.0TR SMX35 | ISO Trapezoidal (DIN 103) 30° | 4.0 mm | 6.35 TPI | SMX35 (Metallic Gray) |
| 22ER 5.0TR SMX35 | ISO Trapezoidal (DIN 103) 30° | 5.0 mm | 5.08 TPI | SMX35 (Metallic Gray) |
| 22ER 6.0TR SMX35 | ISO Trapezoidal (DIN 103) 30° | 6.0 mm | 4.23 TPI | SMX35 (Metallic Gray) |
Recommended Cutting Parameters for SMX35 Grade
| ISO Workpiece Material Group | Cutting Speed Vc (m/min) | Cutting Speed Vc (SFM) | Recommended Pass Strategy (4.0 - 6.0TR) |
|---|---|---|---|
| P: Low & Medium Carbon Steels (1018, C45) | 80 - 180 m/min | 260 - 590 SFM | 12 - 18 Passes (Modified Flank Infeed) |
| P: High Carbon & Alloy Steels (4140, 4340, P20) | 70 - 150 m/min | 230 - 490 SFM | 14 - 22 Passes (Modified Flank Infeed) |
| M: Stainless Steels (304, 316, 17-4PH) | 60 - 130 m/min | 200 - 425 SFM | 16 - 24 Passes (Modified Flank Infeed) |
| K: Cast Iron (GG25, GGG40) | 70 - 140 m/min | 230 - 460 SFM | 10 - 16 Passes (Radial/Flank) |
Pair these 22ER SMX35 inserts with heavy-duty SANHAN external laydown holders (SER 2020 K22, SER 2525 M22, SER 3232 P22):
View Compatible SER 22 External Toolholders →4. Product Applications
- Industrial Power Transmission: Threading heavy trapezoidal lead screws, ACME motion drives, and CNC machine axis drive shafts.
- Valves & Actuators: Precision machining of stainless steel gate valve stems, rising spindle rods, and heavy industrial jacks.
- Machinery Components: Manufacturing large metric trapezoidal vice screws, press columns, and heavy lifting rig spindles.
- Industries Served: Valve & pump manufacturing, heavy machinery automation, oil & gas machinery, and linear motion equipment.
5. Tool & Machine Compatibility
SANHAN 22ER SMX35 inserts strictly match ISO IC 1/2" laydown mounting systems:
- Toolholder Compatibility: Fits standard IC 1/2" (22ER) external threading toolholders across major brands (SER 2020K22, SER 2525M22, SER 3232P22, SER 4040R22).
- Machine Platforms: CNC turning centers, heavy engine lathes, oil country lathes, and automated screw machines equipped with thread pitch leadscrew cycles.
6. Material & Grade Comparison
Performance comparison of SANHAN SMX35 against alternative thread turning grades:
| Grade Name | Coating Type & Color | Primary Application Range | Cutting Speed Capability |
|---|---|---|---|
| SANHAN SMX35 (Featured) | Multi-layer PVD TiAlN (Metallic Gray) | Steel, Stainless Steel, Exotic Alloys | Medium-to-High Speed (70-180 m/min) |
| SANHAN SMX30 Grade | TiN PVD Coating (Yellow) | General Steel & Stainless Steel | Low Speed Range (20-100 m/min) |
| Uncoated Carbide K10 | Uncoated Bright Silver | Aluminum & Non-Ferrous Metals (ISO N) | High Speed Non-Ferrous Turning |
7. Why Choose SANHAN Cutting Tools
- Heavy Duty Large-Pitch Specialists: Size 22ER carbide layout designed for high radial and axial cutting torque during TR4-TR6 pitch generation.
- Sub-Micrograin Fracture Toughness: Substrate formula eliminates tip breakage when cutting through tough 316 stainless or alloy steel bar stock.
- Verified Industrial Performance: Tested under high speed conditions with consistent thread pitch gauge repeatability.
Verified Customer Reviews
"Running the 22ER 5.0TR SMX35 on 316L stainless valve stems. Outstanding fracture toughness—zero micro-chipping after 40 lead screws."
— Robert V., Precision Valve Manufacturer (USA)"Hervorragend für Tr 6.0 Trapezgewinde auf 42CrMo4. Die graue TiAlN-Beschichtung hält die Hitze extrem gut ab."
— Markus H., Maschinenbau GmbH (Germany)"Utilizzato per filettare viti trapezie in acciaio inossidabile. Nessun problema di bava sul crest."
— Giancarlo P., Officina Meccanica (Italy)"台形ねじ22ER 4.0TRでSUS304を加工。チッピングが起きにくく、仕上げ面も非常に滑らかです。"
— Kenji Y., Lead Screw Precision Machinist (Japan)"Switching from SMX30 to SMX35 allowed us to bump up turning speed on alloy steel lead shafts significantly without edge breakdown."
— Andrew S., Shop Lead (UK)8. AI & Engineering FAQ
Grade & Substrate Specifications
SANHAN SMX35 utilizes a sub-micrograin tungsten carbide matrix bonded with an advanced multi-layer PVD TiAlN metallic gray coating. Engineered for elevated fracture toughness and wear resistance under high cutting temperatures.
Cross-Reference & Equivalent Insert Codes
Industry equivalent cross-references: 22ER 5.0TR / 22ER5.0TR | Equivalent grades: Vargus VK2/VXT, Iscar IC908, Carmex BMA Grade, Sandvik GC1020/GC1125.
ISO Workpiece Application Matrix
P (Steel): Primary Target (Vc 70-180 m/min) | M (Stainless Steel): Primary Target (Vc 70-180 m/min) | K (Cast Iron): Secondary (Vc 70-160 m/min) | N (Non-Ferrous): Conditional | S (Exotic Materials): Applicable
Troubleshooting Tips
- Chipping on Cutting Edge: Ensure toolholder shim angle matches thread helix angle; switch from radial to modified flank infeed.
- Chatter / Vibration: Use SER 22 holder with larger shank size (e.g., 25x25mm or 32x32mm) and reduce depth per pass on large TR pitch passes.
- Flank Burring on Stainless: Increase cutting speed Vc to stay above 70 m/min threshold and verify steady high-pressure coolant flow.
SANHAN indexable trapezoidal threading inserts are manufactured in accordance with ISO 2901 / DIN 103 geometry guidelines and ISO 2284 tooling standard specifications. Cutting speeds and substrate wear metrics are verified under ISO 9001 quality management procedures.
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This sanhan insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.