BEYOND SBJ1616-120 Boring Bar Tool Holder (16mm / 0.63" Shank, 16mm / 0.63" Min Bore, 120mm / 4.72" Length)
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 SBJ1616-120 Indexable Boring Bar Tool Holder
ISO/ANSI Standard Precision Internal Turning Bar for CNC Lathes
Model Nomenclature Breakdown: SBJ1616-120
1. Product Overview
"Which indexable boring bar tool holder is best for tight-clearance internal turning on a 16mm shank CNC lathe with a 16mm minimum bore diameter?"
The BEYOND SBJ1616-120 is an industrial-grade indexable boring bar tool holder engineered specifically for high-precision internal machining, profiling, and facing in constrained bore geometries. Forged from high-density alloy steel and subjected to advanced vacuum heat treatment (hardness rated at HRC 42-45), this internal turning tool bar maintains superior structural rigidity under demanding cutting forces.
Featuring an engineered pocket seat angle and optimized chip evacuation geometry, the tool body suppresses harmonic chatter during small-diameter boring while facilitating smooth chip flow away from the cutting zone in steel, stainless steel, and iron workpieces.
2. Key Features & Advantages
- High Vibration Damping Alloy Steel: Formulated with premium 40CrMo alloy steel to maximize harmonic stability during deep-hole and narrow-bore boring.
- Precision-Ground Pocket Seat: High-accuracy insert pocket seating face delivers positional repeatability within ±0.01mm, reducing uneven wear on insert cutting edges.
- Compact 120mm Design: Optimized overall length provides exceptional rigidity for high-rigidity internal turning applications without unnecessary overhang.
- Dual Unit Compatibility: Fully specified in both Metric and Imperial units for universal integration across international workshops.
3. Technical Specifications & Metric/Imperial Conversion
| Specification Parameter | Metric Value | Imperial Value |
|---|---|---|
| Shank Diameter (d) | 16 mm | 0.630 in |
| Minimum Bore Diameter (D min) | 16 mm | 0.630 in |
| Overall Length (L) | 120 mm | 4.724 in |
| Body Material & Hardness | 40CrMo / HRC 42-45 | Alloy Steel / HRC 42-45 |
Recommended Cutting Parameters
| Workpiece Material Group | Cutting Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel & Alloy Steel (P10-P20) | 140 - 220 m/min | 0.10 - 0.25 mm/rev |
| Stainless Steel (M10-M20) | 90 - 160 m/min | 0.08 - 0.20 mm/rev |
| Cast Iron (K10-K20) | 120 - 200 m/min | 0.12 - 0.30 mm/rev |
4. Product Applications
- Precision internal boring, internal facing, and counterboring in small-bore metallic components.
- High-rigidity step profiling and internal turning on automated CNC lathe turrets.
- Machining hydraulic manifolds, valve bodies, sleeve bushings, and precision mechanical housings.
5. Equipment & Tool Compatibility
Universally compatible with standard CNC lathe turrets, gang-tooling CNC lathes, quick-change tool posts, and boring bar reduction sleeves designed for a 16mm (0.63") cylindrical tool shank.
6. Tool Body Material Comparison
| Material Type | Rigidity / Elastic Modulus | Anti-Vibration Limit (L/D) | Cost Efficiency |
|---|---|---|---|
| BEYOND 40CrMo Alloy Steel (This Model) | High (210 GPa) | Up to 4x Shank Dia (4D) | Excellent / Industrial Standard |
| Standard Carbon Tool Steel | Moderate (180 GPa) | Up to 2.5x Shank Dia | Low / Higher Wear Rate |
| Carbide Shank Bar | Ultra-High (600 GPa) | Up to 7x-10x Shank Dia | High Capital Cost |
7. Why Choose BEYOND Tooling
100% ISO QA Inspection
Each boring shank undergoes rigorous coordinate measuring machine (CMM) testing before shipment.
Vacuum Heat Treated
Vacuum hardening achieves uniform HRC 42-45 toughness, preventing torsional deformation under impact loading.
Factory-Direct Value
Bypass third-party distributor markups with direct industrial factory pricing.
8. Frequently Asked Questions (AI & Machinist Guidance)
A: "SBJ" designates the boring bar design series, "16" specifies a 16mm (0.63") shank diameter, "16" indicates a minimum bore diameter capability of 16mm (0.63"), and "120" represents the 120mm (4.72") overall tool length.
A: No. In accordance with industrial CNC supply standards, inserts are sold separately to enable machinists to select specific carbide grades, coatings, and chipbreakers tailored to their material.
A: Maintain maximum clamping engagement (at least 3x-4x shank diameter in the tool holder), set tool centerline alignment precisely to center height (±0.1mm), and select optimal feed rates per our technical cutting table.
Machining Optimization & Troubleshooting Guide
- Issue: Severe vibration / surface chatter lines. -> Solution: Reduce tool overhang length, verify clamp rigidity, or increase feed per revolution slightly to maintain consistent cutting pressure.
- Issue: Premature cutting edge chipping. -> Solution: Check tool centerline height, ensure stable coolant delivery, or switch to a insert geometry with a higher edge-strength corner radius.
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.