BEYOND MGIVR2520-3T8 Spring Steel Internal Grooving & Boring Tool Holder | CNC Internal Cut-Off Tool for MGMN300 Inserts (Insert Not Included)
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BEYOND MGIVR2520-3T8 Spring Steel Internal Grooving & Boring Tool Holder (Does Not Include Inserts)
Industrial-Grade Internal Grooving, Parting & Profiling Boring Bar for CNC Lathes
⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert/blade are strictly for assembly demonstration. The matching MGMN300 carbide grooving insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND MGIVR2520-3T8 is a heavy-duty spring steel internal grooving and boring tool holder engineered for high-precision CNC lathe internal slotting, grooving, and parting operations. Utilizing MGMN300 indexable carbide inserts, it delivers exceptional chatter suppression, high clamping rigidity, and reliable chip evacuation across ISO P, M, and K workpiece classifications.
1. Product Overview
"Which internal grooving tool holder and boring bar provides maximum vibration dampening, deep-bore clearance, and rigid insert clamping for internal recessing operations using MGMN300 inserts?"
The BEYOND MGIVR2520-3T8 spring steel internal grooving and boring bar (frequently searched as internal cut-off tool, CNC grooving boring bar, and internal recessing tool holder) is engineered to withstand severe radial cutting forces inside pre-drilled bores. Forged from premium 60Si2Mn spring steel, the tool body provides superior elastic recovery and exceptional damping characteristics to eliminate harmonic chatter in deep bores. The precision-milled clamping pocket securely holds MGMN300 double-ended grooving inserts, ensuring absolute stability and preventing micro-movement during heavy slotting passes.
ISO Model Designation Breakdown
Need alternative internal grooving bar diameters or widths?
2. Key Features
- Rigid Spring Steel Core: Forged from hardened 60Si2Mn spring steel to provide superior deflection resistance and vibration damping during deep internal machining.
- Precision MGMN Pocket Fit: Custom-milled clamping interface matched specifically for MGMN300 inserts, securing the cutting edge against severe axial and radial loads.
- Optimized Chip Clearance: Internal coolant channeling and refined rake geometry ensure seamless chip evacuation from blind internal bores.
- High Fatigue Endurance: Withstands rigorous continuous production cycles without loss of clamping preload or structural integrity.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification | Imperial Equivalent |
|---|---|---|
| Shank Diameter (D) | 25 mm | 1" (Approx. 0.984") |
| Overall Length (L) | 250 mm | 9.84" |
| Insert Cutting Width (W) | 3.0 mm | 0.118" (Approx. 1/8") |
| Compatible Insert Model | MGMN300 | MGMN 3.0mm Standard |
Recommended Cutting Parameters (MGMN300 Insert) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (f, mm/rev) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 120 - 210 m/min | 0.06 - 0.14 mm/rev |
| ISO M (Stainless Steel) | 80 - 140 m/min | 0.04 - 0.10 mm/rev |
| ISO K (Cast Iron) | 110 - 180 m/min | 0.08 - 0.16 mm/rev |
4. Product Applications
- Internal Retaining Ring & O-Ring Grooves: Precision machining of internal locking grooves and seal channels inside medium-to-large cylinders and housings.
- Internal Recessing & Profiling: Creating relief undercuts and internal contour features on CNC lathe bored parts.
- Deep Bore Slotting: High-rigidity spring steel shank allows deep internal grooving without tool wandering or deflection.
- Hydraulic Valve & Precision Bushing Production: Reliable tolerance control across alloy steels and ductile iron components.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard MGMN300 (3.0mm width) double-ended indexable carbide grooving inserts.
Tool Holding: Mounts securely into 25mm split boring bar bushings, lathe boring holders, and CNC turret blocks.
Clamping Hardware: Equipped with precision high-tensile locking screws and wrenches designed for secure, repeatable insert indexing.
6. Material Comparison: 60Si2Mn Spring Steel vs. Standard Carbon Steel
Vibration Suppression: Spring steel absorbs harmonic frequencies generated deep inside bores much faster than standard carbon steel, preventing chatter marks on groove walls.
Rigidity Under Load: Higher yield strength prevents tool tip deflection during heavy radial grooving passes.
Fatigue Endurance: Retains clamping preload and structural rigidity over thousands of continuous production cycles.
7. Why Choose BEYOND Tooling?
- ISO 5608 Manufacturing Standards: Certified production processes guarantee strict compliance with international mechanical properties and tolerances.
- Direct Factory Pricing: Premium metallurgical performance supplied directly from manufacturing lines without intermediate distributor markups.
- Master Machinist Support: Expert technical assistance ready to help optimize feed rates, cutting speeds, and grade selection for your application.
8. Frequently Asked Questions
Q: Does the BEYOND MGIVR2520-3T8 package include the MGMN insert?
A: No. To allow maximum grade flexibility depending on your specific workpiece metallurgy and coating requirements, the MGMN300 insert is sold separately.
Q: What is the minimum bore diameter required for this 25mm internal grooving bar?
A: The minimum recommended bore diameter for this tool configuration is 32mm, ensuring adequate clearance between the shank body and the inner wall.
Q: Is this boring bar suitable for external grooving or only internal?
A: This specific MGIVR model is designed strictly for internal grooving, parting, and recessing; please select our external grooving category for outer diameter work.
Grade Comparison: PVD-coated carbide grades provide excellent edge toughness for stainless steel internal grooving; CVD-coated grades excel in high-speed alloy steel slotting.
Equivalent Models: Fully cross-compatible with universal modular internal grooving tool systems adhering to standard ISO / ANSI specifications.
Troubleshooting: Excessive chatter or insert chipping in deep internal grooves usually indicates overhang exceeding recommended limits; reduce feed rate or use a heavy-duty carbide shank bar.
Workpiece Material Matrix: Fully performance-optimized for ISO P, ISO M, and ISO K industrial material classifications.
Authoritative Endorsement: Dimensional parameters and structural design benchmarked against ISO 5608 Tool Holder Standards and certified 60Si2Mn spring steel 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.