BEYOND SNR0013M16-A16 Internal Right-Hand Threading Boring Bar | Stepped Reducing Shank 13mm Tool Neck to 16mm (5/8" Imperial Sizing) CNC Lathe Turning Bar for 16IR & 16IRM Indexable Carbide Inserts
BEYOND SNR0008K08 Internal Right-Hand Threading Boring Bar | 8mm Shank Diameter (5/16" Imperial Sizing Equivalent) CNC Lathe Turning Toolholder for 08IR & 08IRM Indexable Carbide Inserts
Beyond SNR0007K08 / SNL0007K08 Internal Threading Boring Bar for 08IR/L Inserts
BEYOND SNL0013M16 Internal Left-Hand Threading Boring Bar | 13mm Shank Diameter (1/2" Imperial Sizing Equivalent) CNC Lathe Turning Toolholder for 16ER & 16ERM Indexable Carbide Inserts
BEYOND SNR0005K06-A12 Ultra-Micro Internal Right-Hand Threading Boring Bar | Stepped Reducing Shank 5mm Tool Neck to 12mm (0.472") Holder Body for 06IR & 06IRM Carbide Inserts
BEYOND SNL0013M16-A16 Internal Left-Hand Threading Boring Bar | Stepped Reducing Shank 13mm Tool Neck to 16mm (5/8" Imperial Sizing) CNC Lathe Turning Bar for 16ER & 16ERM Indexable Carbide Inserts
BEYOND SNL0020R22 External Left-Hand Heavy Threading Boring Bar | Stepped Reducing Shank 20mm Tool Neck to 20mm (3/4" Imperial Sizing) CNC Lathe Turning Bar for 22ER & 22ERM Indexable Carbide Inserts
BEYOND SNR0020R22 Internal Right-Hand Heavy Threading Boring Bar | Stepped Reducing Shank 20mm Tool Neck to 20mm (3/4" Imperial Sizing) CNC Lathe Turning Bar for 22IR & 22IRM Indexable Carbide Inserts
BEYOND SNR0013M16 Internal Threading Boring Bar (13mm Shank for 16IR / 16NR Inserts)
BEYOND SNR0020R16 Internal Right-Hand Threading Boring Bar | 20mm Shank Diameter (3/4" Imperial Sizing Equivalent) CNC Lathe Turning Toolholder for 16IR & 16IRM Indexable Carbide Inserts
BEYOND SNR0032T27 Internal Right-Hand Heavy-Duty Threading Boring Bar | Stepped Reducing Shank 32mm Tool Neck to 32mm (1-1/4" Imperial Sizing) CNC Lathe Turning Bar for 27IR & 27IRM Indexable Carbide Inserts
BEYOND SNR0025S27 Internal Right-Hand Heavy Threading Boring Bar | Stepped Reducing Shank 25mm Tool Neck to 25mm (1" Imperial Sizing) CNC Lathe Turning Bar for 27IR & 27IRM Indexable Carbide Inserts
BEYOND SNR0032T22 Internal Right-Hand Heavy-Duty Threading Boring Bar | Stepped Reducing Shank 32mm Tool Neck to 32mm (1-1/4" Imperial Sizing) CNC Lathe Turning Bar for 22IR & 22IRM Indexable Carbide Inserts
BEYOND SNR0025S22 Internal Right-Hand Heavy-Duty Threading Boring Bar | Stepped Reducing Shank 25mm Tool Neck to 25mm (1" Imperial Sizing) CNC Lathe Turning Bar for 22IR & 22IRM Indexable Carbide Inserts
BEYOND SNR0032T16 Heavy-Duty Internal Right-Hand Threading Boring Bar | Stepped 32mm Shank to Size 16 Head (1-1/4" Imperial Sizing) CNC Lathe Turning Toolholder for 16IR & 16IRM Indexable Carbide Inserts
BEYOND SNR0008K08-A16 Internal Threading Boring Bar | Stepped Reducing Shank 8mm Tool Neck to 16mm (0.625") Holder Body for 08ER & 08ERM Carbide Inserts
BEYOND SNR0007K08-A16 Internal Threading Boring Bar | Stepped Reducing Shank 7mm Tool Neck to 16mm (0.625") Holder Body for 08ER & 08ERM Carbide Inserts
BEYOND SNR0006M08-A16 Internal Threading Boring Bar | Stepped Reducing Shank 6mm Tool Neck to 16mm (0.625") Holder Body for 08ER & 08ERM Carbide Inserts
BEYOND SNR0008K08-A12 Internal Threading Boring Bar | Stepped Reducing Shank 8mm Tool Neck to 12mm (0.472") Holder Body for 08ER & 08ERM Carbide Inserts
BEYOND SNR0008K11-A12 Internal Threading Boring Bar | Stepped Reducing Shank 8mm Tool Neck to 12mm (0.472") Holder Body for 11IR & 11IRM Carbide Inserts
BEYOND SNL0012M11-A16 Left-Hand Internal Threading Boring Bar | Stepped Reducing Shank 12mm Tool Neck to 16mm (0.625") Holder Body for 11ER & 11ERM Carbide Inserts
BEYOND SNL0010K11-A16 Left-Hand Internal Threading Boring Bar | Stepped Reducing Shank 10mm Tool Neck to 16mm (0.625") Holder Body for 11ER & 11ERM Carbide Inserts
BEYOND SNR0012M11-A16 Internal Threading Boring Bar | Stepped Reducing Shank 12mm Tool Neck to 16mm (0.625") Holder Body for 11IR & 11IRM Carbide Inserts
BEYOND SNR0010K11-A16 Internal Right-Hand Threading Boring Bar | Stepped Reducing Shank 10mm Tool Neck to 16mm (0.625") Holder Body for 11IR & 11IRM Carbide Inserts
BEYOND Internal Threading Boring Bars: SNR & SNL Series
BEYOND SNR and SNL internal threading boring bars are designed for precision internal thread cutting on CNC lathes and turning centers. Compatible with the four most common threading insert sizes (08IR, 16IR, 22IR, 27IR), our boring bar lineup covers thread pitches from 0.5 mm to 3.0 mm across shank diameters from Ø16 mm to Ø32 mm. Each bar is precision-ground from vacuum-quenched alloy steel, balanced to G6.3, and equipped with internal coolant channels for 70+ bar high-pressure delivery directly to the cutting edge.
SNR vs SNL Series: Which to Choose
The SNR and SNL series serve different rigidity needs. SNR bars are designed for standard-duty internal threading on general-purpose CNC lathes, while SNL bars offer extended shank lengths and a reinforced neck profile for deep-pocket or hard-to-reach threads.
| Property | SNR Series | SNL Series |
|---|---|---|
| Design | Standard internal threading bar | Long-reach / reinforced neck |
| Shank Ø | 16, 20, 25 mm | 20, 25, 32 mm |
| Min bore diameter | Ø10 mm (08IR inserts) | Ø14 mm (16IR inserts) |
| Max reach (L/D ratio) | 4×D | 6×D (with damped variant 8×D) |
| Coolant | Through-coolant (70+ bar HP) | Through-coolant (70+ bar HP) |
| Best for | General CNC lathe threading, low-to-medium rigidity | Deep pocket threads, slender shafts, long overhang |
| Common insert | 08IR, 16IR | 16IR, 22IR, 27IR |
| Cost | From $89 | From $120 |
Quick selection: Choose SNR when you need a standard short bar for general threading on parts with short reach and standard rigidity. Choose SNL when you need to thread inside deep pockets or on long thin shafts where standard bars would chatter. For details on how boring bars work, see our Tool Holder Guide.
Compatible Threading Inserts (08IR / 16IR / 22IR / 27IR)
BEYOND SNR and SNL bars accept the four most common ISO metric threading insert sizes. Each size covers a specific pitch range:
| Insert Size | IC (mm) | Pitch Range (mm) | UNF / TPI Range | Bar Series | Min Bore Ø |
|---|---|---|---|---|---|
| 08IR | 6.35 | 0.5 - 1.0 | 40 - 24 TPI | SNR16 | Ø10 mm |
| 16IR | 9.525 | 0.75 - 1.75 | 32 - 14 TPI | SNR20 / SNL20 | Ø13 mm |
| 22IR | 12.7 | 1.5 - 2.5 | 16 - 10 TPI | SNR25 / SNL25 | Ø17 mm |
| 27IR | 15.875 | 2.0 - 3.0 | 12 - 8 TPI | SNL32 | Ø21 mm |
Browse our Mitsubishi threading insert collection for direct-fit inserts, or use our Grade Cross-Reference Hub to find equivalents across 8 brands (Mitsubishi, Sandvik, Kyocera, Tungaloy, TaeguTec, KORLOY, Sumitomo, ZCC·CT).
Specifications
| Parameter | SNR Series | SNL Series |
|---|---|---|
| Shank diameter | Ø16 / Ø20 / Ø25 mm | Ø20 / Ø25 / Ø32 mm |
| Shank tolerance | h6 (IT5) | h6 (IT5) |
| Overall length (L) | 120 / 150 / 180 mm | 180 / 220 / 280 mm |
| Body material | 20CrMnTi vacuum-quenched | 20CrMnTi vacuum-quenched |
| Surface hardness | HRC 56-60 | HRC 56-60 |
| Surface finish | Ni-plated, Ra ≤ 0.4 μm on shank | Ni-plated, Ra ≤ 0.4 μm on shank |
| Runout at 3×D | ≤ 0.005 mm | ≤ 0.005 mm |
| Coolant channels | Through-coolant (single port) | Through-coolant (dual port) |
| Max coolant pressure | 150 bar | 150 bar |
| Insert clamping | Top clamp (screw + chipbreaker) | Top clamp (screw + chipbreaker) |
| Insert seat size | 08IR / 16IR / 22IR | 16IR / 22IR / 27IR |
| Balance grade | G6.3 @ 8,000 RPM | G6.3 @ 8,000 RPM |
For more on how boring bar specifications interact with your machine's rigidity and spindle speed, see our Speeds and Feeds Calculator.
Recommended Speeds & Feeds (by Material)
Internal threading cutting parameters vary significantly by workpiece material. The table below lists starting parameters for BEYOND SNR/SNL bars with PVD-coated threading inserts. Always adjust based on your setup rigidity and insert wear:
| Material | Vc (m/min) | Insert Grade | Number of Passes | Coolant |
|---|---|---|---|---|
| Mild steel (1018, A36) | 80-150 | PVD Al-Ti-N (K20-K30) | 6-10 (full profile) | 50-70 bar flood |
| Alloy steel (4140, 4340) | 60-120 | PVD Al-Ti-N (YG10X) | 8-12 (full profile) | 70+ bar HP |
| Stainless (304, 316) | 40-90 | PVD Al-rich (VP15TF class) | 10-15 (full profile) | 70+ bar HP mandatory |
| Cast iron (gray, ductile) | 70-130 | Uncoated or CVD TiN (K-grade) | 6-10 (full profile) | Dry or MQL |
| Aluminum (6061, 7075) | 100-200 | Uncoated polished (H01) | 4-8 (full profile) | Flood (15+ bar) |
| Hardened steel (HRC 45+) | 30-60 | PVD AlTiN (sub-micron) | 12-20 (split profile) | 70+ bar HP |
| Titanium (Ti-6Al-4V) | 25-50 | PVD Al-rich with coolant holes | 15-25 (split profile) | 70+ bar HP mandatory |
Internal threading typically uses full-profile inserts (one insert cuts the entire thread in multiple passes) for ≤ 1.5 mm pitch, and split-profile (V-profile) inserts for larger pitches or harder materials. Refer to our ISO Code reference for the difference between "IR" full-profile and partial-profile thread insert designations.
Applications & Compatible Materials
BEYOND SNR and SNL internal threading boring bars are used in three primary B2B application areas:
1. Hydraulic & Pneumatic Fittings
Internal BSP / NPT / JIC threads on valve bodies, manifold blocks, and fitting adapters. Most common in fluid power systems for industrial machinery. Compatible insert grades: 16IR / 22IR (BSP), 16IR (NPT), 22IR (JIC 37° flare).
2. Automotive & Aerospace Components
Internal threads on transmission housings, engine blocks, landing gear actuators, and hydraulic manifolds. Common insert sizes: 16IR (M10-M16), 22IR (M18-M24), 27IR (M27-M36). High-grade thread accuracy required (IT6-IT7).
3. General CNC Lathe Work
Threaded hubs, pipe nipples, threaded bushings, valve stems. Most flexible use case — works with all four insert sizes and material families.
| Material Family | Recommended Insert | Vc Range | Passes |
|---|---|---|---|
| Carbon / alloy steel | PVD Al-Ti-N K-grade | 60-150 m/min | 6-12 |
| Stainless steel (austenitic) | PVD Al-rich (VP15TF class) | 40-90 m/min | 10-15 |
| Cast iron (gray / ductile) | Uncoated or TiN-coated K-grade | 70-130 m/min | 6-10 |
| Aluminum (non-ferrous) | Uncoated polished (H01) | 100-200 m/min | 4-8 |
| Hardened steel (HRC 45+) | PVD AlTiN sub-micron | 30-60 m/min | 12-20 |
Why Choose BEYOND SNR / SNL Internal Threading Boring Bars
BEYOND house-brand boring bars are produced in our 12,000 sqm Zhuzhou facility with the same vacuum-quenched 20CrMnTi construction and G6.3 dynamic balance as Sandvik and Kennametal equivalents — at 30-50% lower cost.
Browse inserts by operation type (turning / milling / drilling / threading)
8-brand grade equivalent lookup (Mitsubishi / Sandvik / Kyocera / Tungaloy etc.)
Brother collection for outside diameter threading (SER / SEL series)
Direct-fit insert for SNR/SNL bars (16IR / 22IR / 27IR)
How boring bars, chucks, and U-drills compare across types
Full Vc / fz / ap formula reference and material speed chart
Frequently Asked Questions
What is the difference between SNR and SNL boring bars?
SNR is a standard-duty internal threading bar for general CNC lathe work (Ø16-25mm shank, 4×D reach). SNL is a long-reach / reinforced neck bar for deep-pocket threading on long thin shafts (Ø20-32mm shank, 6×D reach, with damped variant up to 8×D). Both accept the same insert sizes in their overlap range (16IR, 22IR).
Which insert size do I need: 08IR, 16IR, 22IR, or 27IR?
Insert size selection is based on the thread pitch (mm or TPI) and the minimum bore diameter you can reach. 08IR = 0.5-1.0 mm pitch (40-24 TPI), min bore Ø10mm. 16IR = 0.75-1.75 mm pitch (32-14 TPI), min bore Ø13mm. 22IR = 1.5-2.5 mm pitch (16-10 TPI), min bore Ø17mm. 27IR = 2.0-3.0 mm pitch (12-8 TPI), min bore Ø21mm. When in doubt, choose the largest insert that fits your bore.
Are BEYOND bars compatible with Mitsubishi or Sandvik threading inserts?
Yes. BEYOND SNR and SNL bars use the standard ISO 513 insert seat geometry, so they accept any ISO IR-style threading insert from any major brand — Mitsubishi (MTS, MTA series), Sandvik (R200 series), Kyocera (KTN, KTR series), Tungaloy, KORLOY, Sumitomo, ZCC·CT, and TaeguTec. Use our Grade Cross-Reference Hub to find equivalent inserts across brands.
What coolant pressure is required for internal threading?
For stainless steel, titanium, and other heat-resistant alloys, 70+ bar high-pressure coolant is mandatory to prevent built-up edge and chip welding. For mild steel and cast iron, 30-50 bar flood is usually sufficient. All BEYOND SNR/SNL bars are rated for 150 bar max coolant pressure and have through-coolant channels that direct flow to the cutting edge.
How do I know if my boring bar is rigid enough for the application?
The general rule is L/D ratio (overall length ÷ shank diameter) should not exceed 4×D for standard bars, 6×D for reinforced bars, and 8×D only for damped boring bars. If chatter occurs, reduce the L/D by using a shorter bar or a larger shank, or switch to a damped boring bar. The Tool Holder Guide has a rigidity comparison table.
What is the lead time for custom shank sizes?
Standard SNR/SNL shank sizes (16, 20, 25, 32 mm) are in stock with 2-3 day dispatch worldwide. Custom shank sizes (e.g., 12mm, 18mm, 22mm, 28mm) are available with 2-3 week lead time and 50-piece MOQ. Contact our engineering team at WhatsApp +86 159-9066-3752 or /pages/contact for custom shank inquiries.
Related Tools & Resources
- All Turning Tool Holders — external + internal tool holder hub
- Carbide Inserts by Operation — Pillar 2 hub
- Carbide Inserts by ISO Code — Pillar 3 hub (IR designation explained)
- Grade Cross-Reference Hub — Pillar 4 (find equivalent insert grades)
- Speeds & Feeds Hub — Pillar 5 (Vc/f/ap reference)
- Tool Holder Guide — Pillar 6 (boring bar / U-drill / chuck comparison)
- General Insert Grade Cross-Reference — legacy tool
- External Threading Bars (SER/SEL) — companion collection
- Mitsubishi Threading Inserts — direct-fit inserts
- Premium Carbide Inserts (All Global Brands) — 5,880 SKU master collection
- Best Sellers (Top Picks Across All Brands) — high-conversion cross-sell
- Holder Accessories — replacement parts, screws, shims
- Request Sample Catalogs — physical catalog for offline reference
- Warranty & Returns — quality guarantee
Need a Custom Internal Threading Solution?
Our engineering team can recommend the right SNR / SNL boring bar + insert combination for your specific thread (pitch / material / depth / machine rigidity). 24-hour quote turnaround. Bulk pricing on 50+ piece orders.
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