BEYOND MGHH420R-100/140 T18 Spring Steel External Grooving and Parting Tool Holder | Metric 20mm Shank / Imperial 0.787" for MGMN400 Inserts (Does Not Include Inserts)
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BEYOND MGHH420R-100/140 T18 Spring Steel External Grooving and Parting Tool Holder (Does Not Include Inserts)
Industrial-Grade Right-Hand Spring Steel External Grooving and Parting Tooling for High-Precision CNC Lathe OD Operations
⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert are strictly for assembly demonstration. The matching MGMN400 carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND MGHH420R-100/140 T18 is an elite heavy-duty external grooving and parting tool holder forged from high-elasticity 60Si2Mn spring steel. Engineered for precision external diameter (OD) grooving, recessing, and parting-off applications using MGMN400 indexable carbide inserts within a robust 20mm rectangular shank design, it delivers exceptional vibration suppression, rigid clamping, and absolute dimensional stability across ISO P, M, and K workpiece categories.
1. Product Overview
"Which external grooving tool holder provides maximum chatter resistance, superior elastic recovery, and structural rigidity for heavy OD grooving and parting operations using MGMN400 inserts?"
The BEYOND MGHH420R-100/140 T18 spring steel external grooving and parting tool holder (also searched as external grooving tool post, CNC OD grooving holder, and spring steel parting bar) is engineered to resolve severe tool deflection and chatters in external diameter (OD) grooving, face profiling, and parting-off tasks. Forged from premium 60Si2Mn spring steel with an optimized body profile, the bar offers an elite elastic limit and high tensile damping capacity that absorbs harmonic vibrations during extended overhang machining. The precision-ground insert pocket and rigid clamping geometry guarantee a secure seat for MGMN400 carbide inserts, optimizing chip evacuation and OD surface finish integrity.
ISO Model Designation Breakdown
Need alternative external grooving or parting tool holder sizes?
2. Key Features
- Spring Steel Vibration Dampening Body: Forged from high-elasticity 60Si2Mn spring steel, providing exceptional structural stiffness and natural harmonic damping to eliminate chatter during heavy OD grooving.
- Rigid Insert Clamping System: Engineered pocket design ensures absolute seat stability for MGMN400 4mm grooving inserts, preventing micro-movement under heavy radial cutting forces.
- Optimized External Chip Clearance: Streamlined head architecture facilitates smooth coolant delivery and reliable chip evacuation from external cuts.
- High Fatigue Resistance: Resists continuous cyclic stress fatigue far better than ordinary structural steels, extending tool life in high-speed CNC operations.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification | Imperial Equivalent |
|---|---|---|
| Shank Height | 20 mm | 0.787" (~3/4") |
| Compatible Insert Width | 4 mm (MGMN400 Series) | 0.157" |
| Compatible Insert Series | MGMN400 | MGMN400 |
| Tool Hand Orientation | Right Hand (R) | Right Hand (R) |
Recommended Cutting Parameters (MGMN400 Insert) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (f, mm/rev) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 100 - 180 m/min | 0.05 - 0.15 mm/rev |
| ISO M (Stainless Steel) | 70 - 140 m/min | 0.04 - 0.12 mm/rev |
| ISO K (Cast Iron) | 110 - 190 m/min | 0.06 - 0.18 mm/rev |
4. Product Applications
- External Diameter (OD) Grooving: Precision machining of heavy external retaining ring grooves, O-ring slots, and wide relief channels.
- External Parting-Off & Cut-Off: Controlled heavy-duty external cut-off operations on solid bars and large tubular components.
- Automotive Shaft & Industrial Roller Manufacturing: External profiling and wide grooving requiring high dimensional accuracy.
- General CNC Lathe External Tooling: Heavy OD grooving across steel, alloy steel, and stainless steel workpieces.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard MGMN400 4mm indexable carbide grooving inserts.
Machine Tooling Holders: Installs securely into standard 20mm lathe tool post turrets and heavy external tool blocks.
Clamping Hardware: Equipped with high-tensile clamping screws designed to withstand extreme radial and axial cutting loads without slip.
6. Material Comparison: 60Si2Mn Spring Steel vs. Standard Carbon Steel
Elastic Deflection Recovery: 60Si2Mn spring steel springs back precisely true to axis under heavy radial grooving loads, whereas standard carbon steel holders suffer permanent bending deflection.
Damping Capacity: Features superior internal structural damping to suppress chatter during heavy external parting where overhang ratios are critical.
Fatigue Endurance: Resists continuous cyclic stress fatigue far better than ordinary structural steels, extending tool life in high-production machining.
7. Why Choose BEYOND Tooling?
- ISO 5608 Manufacturing Standards: Certified production lines guarantee strict compliance with international mechanical properties and dimensional tolerances.
- Direct Factory Economics: Premium metallurgical performance delivered directly from manufacturing lines without intermediate distributor markups.
- Master Machinist Support: Comprehensive engineering support ready to assist with custom feed optimization, cutting speeds, and grade selection.
8. Frequently Asked Questions
Q: Does the BEYOND MGHH420R-100/140 T18 package include the cutting insert?
A: No. To allow maximum grade flexibility depending on your specific workpiece metallurgy and coating requirements, the MGMN400 insert is sold separately.
Q: What size groove width does this tool holder support?
A: This holder is engineered specifically for 4mm wide grooving and parting inserts (MGMN400 series).
Q: What is the recommended tool post height setting for this 20mm shank holder?
A: Set the cutting edge precisely on the lathe center line to ensure optimal tool life and prevent insert breakage during heavy parting operations.
Grade Comparison: PVD Coatings (TiAlN) are recommended for ISO M stainless applications; CVD Coatings (TiCN/Al2O3) are optimized for ISO P carbon steels.
Equivalent Models: Fully cross-compatible with universal modular external grooving and parting frameworks conforming to standard ISO architecture.
Troubleshooting: Poor OD groove surface finish or insert chipping usually stems from improper center height or excessive feed; check tool alignment and reduce feed.
Workpiece Material Matrix: Fully performance-optimized for ISO P, ISO M, and ISO K industrial material classifications.
Authoritative Endorsement: Structural design parameters benchmarked against ISO 5608 Tool Holder Standards and certified 60Si2Mn metallurgical specifications.
Need Help With OYYU/BEYOND Inserts?
Looking for a OYYU/BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This OYYU/BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.