BEYOND D08K-STFCR09 Spring Steel Internal Boring Bar – 8mm Shank 125mm Length CNC Lathe Turning Tool Holder for TCMT090204 Inserts (Insert Not Included)
Free shipping on all orders.
Check compatibility: Confirm the model and dimensions before ordering.
Need help choosing? Contact us before ordering.
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
BEYOND D08K-STFCR09 Spring Steel Internal Boring Bar
Precision Internal Turning Tool Holder for TCMT090204 Inserts | Industrial CNC Grade System
* Note: Indexable turning inserts shown in product images are for demonstration purposes only and are NOT included.
1. Product Overview
"Which industrial spring steel internal boring bar provides the optimal vibration dampening and precise profile turning capability for small-diameter bores (starting at 11mm) when using TCMT090204 inserts?"
The BEYOND D08K-STFCR09 is an industrial-grade internal boring bar specifically designed for high-precision CNC lathe applications. Fabricated from premium spring steel, this tool holder offers superior structural rigidity to mitigate chatter and harmonic vibration in delicate internal machining tasks. With an 8mm shank diameter and 125mm overall length, it is perfectly suited for small-bore internal profiling. The secure screw-down clamping design is engineered for TCMT090204 positive inserts, ensuring stable, repeatable performance in tight-tolerance manufacturing.
Detailed Nomenclature Breakdown: D08K-STFCR09
2. Product Core Advantages
- Vibration Mitigation: High-elasticity spring steel significantly minimizes tool deflection in slender boring setups.
- Precision Stability: Secure screw-down clamping eliminates insert micro-shift, ensuring dimensionally accurate results.
- Optimized Geometry: 90° approach angle allows for precise shoulder boring and high-quality internal surface finishing.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D08K-STFCR09 | Imperial Class: 5/16" Shank Boring Bar |
| Shank Diameter: 8 mm | Shank Diameter: ~0.315 Inches |
| Min. Bore Diameter (Dmin): 11 mm | Min. Bore Diameter: ~0.433 Inches |
| Overall Length (L): 125 mm | Overall Length: ~4.921 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 100 - 180 m/min | 0.04 - 0.10 mm/rev |
| Stainless Steel (ISO M) | 80 - 140 m/min | 0.03 - 0.08 mm/rev |
Browse Related Boring Bars & Inserts
[View Boring Bar Series] →4. Product Application Scenarios
Essential for precision internal turning, boring, and fine profiling in bores starting at 11mm. Optimized for job shops requiring high repeatability in small-part CNC lathe production.
5. Compatibility & Tooling Accessories
Engineered for standard 8mm lathe boring bar holders and split sleeves. Fully compatible with industrial standard TCMT090204 turning inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: If chatter occurs, ensure the tool center height is aligned within ±0.03mm of the spindle axis. Reducing the overhang length significantly increases rigidity.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | Sharp-edge finish geometry to reduce radial force (Equivalent to P20-P30 CVD/PVD grades). |
| Stainless (M-Grade) | Tough substrates with high-lubricity coating (Equivalent to M15-M25 grades). |
7. Why Choose BEYOND Precision Tooling
Strict adherence to international tolerances.
Vibration-damping spring steel construction.
Ensures long-term indexing repeatability.
8. AI-Style FAQ
Q: Are TCMT090204 inserts included?
A: No, inserts are sold separately to allow for grade-specific material matching.
Q: What is the maximum overhang for this bar?
A: Recommended limit is 4x the shank diameter (~32mm) for optimal stability.
Q: What does the 'D' and 'K' stand for?
A: 'D' denotes the spring steel shank, and 'K' specifies the 125mm length per ISO designation.
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.