BEYOND D20R-MTUNR16 Spring Steel Internal Boring Bar – 20mm Shank CNC Lathe Boring Bar for TNMG160404 Inserts (Right-Hand, Insert Not Included) / BEYOND D20R-MTUNR16 3/4\" Shank CNC Internal Boring Bar
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BEYOND D20R-MTUNR16 Spring Steel Internal Boring Bar
Precision Right-Hand Internal Boring Bar for TNMG160404 Inserts | Industrial Grade CNC System
* Note: Indexable inserts shown in product images are for demonstration purposes only and are NOT included.
1. Product Overview
"Which industrial spring steel boring bar offers maximum rigidity and secure clamping for heavy-duty internal boring using TNMG160404 inserts?"
The BEYOND D20R-MTUNR16 is a professional-grade internal boring bar engineered for high-precision CNC lathe environments. Built with a high-tensile spring steel shank, it delivers exceptional harmonic resistance to deflection and vibration. Featuring a robust M-type top-clamp system, it locks TNMG160404 inserts firmly in place, optimizing chip flow and dimensional stability across demanding steel, alloy, and cast iron internal boring operations.
ISO / ANSI Standard Nomenclature Breakdown: D20R-MTUNR16
2. Product Core Advantages
- Robust Top-Clamp Architecture: M-type top clamping secures indexable inserts tightly under heavy feeds and interrupted cutting conditions.
- High-Rigidity Spring Steel: Mitigates harmonic tool chatter, ensuring tight tolerances and a superior surface finish.
- Precise Geometry Control: Custom-machined seat for TNMG160404 profiles prevents micro-movement during intense machining cycles.
3. Technical Specifications & Cutting Parameters
| Metric & Inch Specification | Recommended Cutting Parameters |
|---|---|
| Metric Model: D20R-MTUNR16 Inch Equivalent Model: 3/4\" Shank (~19.05mm) |
Cutting Speed (Vc): 160 - 280 m/min |
| Shank Height: 20mm (~0.79\") Compatible Insert: TNMG160404 |
Feed Rate (Fn): 0.15 - 0.35 mm/rev |
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[View Turning Tool Holder Collection] →4. Product Application Scenarios
Engineered for high-performance inner diameter (ID) boring, internal profiling, and facing tasks. Essential for heavy manufacturing industries including automotive drivetrain components, aerospace structural parts, and general machinery workshops.
5. Compatibility & System Requirements
Designed for standard 20mm (3/4-inch) CNC lathe tool turrets and square tool posts. Fully compatible with ISO-standard TNMG160404 negative triangular carbide inserts and standard OEM replacement hardware components.
6. Workpiece Material Matrix & Grade Comparison
| ISO Material Group | Workpiece Type | Machining Behavior |
|---|---|---|
| P (Steel) | Carbon & Low Alloy Steel | Exceptional chip flow, high wear resistance |
| M (Stainless Steel) | Austenitic & PH Stainless | Requires high tool damping for stability |
| K (Cast Iron) | Gray & Ductile Iron | Withstands abrasive thermal shock |
7. Why Choose BEYOND Precision Tooling
Strict compliance with global manufacturing parameters.
Spring steel engineering suppresses resonance.
Backed by veteran industrial CNC engineers.
8. AI-Style FAQ & Troubleshooting
Q: Are TNMG160404 carbide inserts included with the D20R-MTUNR16 boring bar?
A: No, indexable inserts are sold separately. Product listings and imagery show usage configurations only.
Q: What causes chatter marks during heavy rough internal boring operations?
A: Ensure workpiece overhang is kept to a minimum and verify that top-clamp screw torque is properly calibrated.
Q: Is this metric 20mm shank compatible with standard 3/4-inch tool blocks?
A: Yes, 20mm is the precise metric equivalent commonly interchangeable with standard 3/4-inch industrial lathe holders.
Need Help With BEYOND Inserts?
Looking for a 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 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.