Beyond SRAPL2525M12 CNC Turning Tool Holder (25x25mm Left-Hand Shank)
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Beyond SRAPL2525M12 Left-Hand CNC Turning Tool Holder
⚠️ PRODUCTION NOTICE: Carbide Inserts Not Included
Please note that the indexable carbide inserts shown in our tool holder product photos are for operational demonstration, pocket alignment, and application mapping visualization only. The Beyond SRAPL2525M12 package contains exclusively the hardened left-hand tool holder shank and matching hardware assembly. Coated carbide inserts must be purchased separately.
1. Product Overview
The Beyond SRAPL2525M12 is an industrial-grade, left-hand external indexable turning tool holder built for precision CNC lathe turrets and automated high-production setups. Engineered around a rigid 25x25mm square shank body, this holder is custom-contoured for 12mm round carbide inserts—specifically the RPMT 1204 / RPMR 1204 international standard series. Its specialized left-hand configuration enables optimal approach paths on back-turning, shoulder contouring, and specific reverse-spindle setups. The round insert geometry provides an exceptionally strong cutting edge that lacks a vulnerable point location, spreading cutting forces evenly along the radius arc. This unique force distribution substantially dampens machine chatter and localized micro-fractures, making it the premier choice for peeling heavy mill scales, processing stainless steels, and completing complex radius profiling tasks.
2. Product Key Features
- Hardened Chrome-Moly Alloy Matrix: Quenched and tempered to high industrial HRC ratings, this tool block absorbs high-load mechanical harmonics during aggressive cutting depths.
- Left-Handed Orientation Efficiency: Precision engineered for left-hand tool positions, reverse spindle indexing, or back-copying paths across challenging component faces.
- Unobstructed Center-Screw Clamping: Low-profile metric flathead screw mechanism provides absolute clearance for continuous chip sliding over the insert chipbreaker.
- Chemical Matte Black Finish: Advanced industrial-grade anti-friction black oxide treatment reduces thermal chip welding and eliminates raw body rusting under continuous coolant flood spray.
ISO Tool Designation Nomenclature Diagram
Looking for premium indexable carbide inserts calibrated for this left-hand shank?
Browse Compatible RPMT 1204 Inserts Here →3. Technical Specifications & Dimension Conversions
| ISO Specification Parameter | Metric Designation (Standard) | Imperial Cross-Reference Equivalent |
|---|---|---|
| Shank Dimension (H x W) | 25 mm × 25 mm | approx. 1" × 1" (0.984" × 0.984" Shank Size) |
| Overall Tool Length (OAL) | 150 mm | approx. 5.905 inches |
| Compatible Insert Specification | RPMT 1204 MO / RPMR 1204 | RPM. 43 (ANSI Industry Equivalent) |
| Clamping Screw Hardware | M4.0 × 10.0 mm | M4.0 × 10.0 mm |
| Torx Wrench Drive Interface | T15 Flag Driver Key | T15 Flag Driver Key |
Recommended Industrial Cutting Parameters
| Workpiece Material Family | Cutting Speed ($Vc$) Range | Optimal Feed Rate ($f$) Range |
|---|---|---|
| P (Carbon/Alloy Structural Steels) | 140 - 280 m/min (460 - 920 SFM) | 0.18 - 0.50 mm/rev (0.007 - 0.020 in/rev) |
| M (Stainless Steel Materials) | 90 - 180 m/min (295 - 590 SFM) | 0.12 - 0.38 mm/rev (0.005 - 0.015 in/rev) |
| K (Grey, Malleable & Ductile Cast Irons) | 120 - 240 m/min (390 - 785 SFM) | 0.20 - 0.55 mm/rev (0.008 - 0.022 in/rev) |
4. Product Application Scenarios
The specific pairing of a 25mm (1") left-hand shank block with large 12mm circular insert profiles excels across specific heavy industrial turning steps:
- Left-Handed Back Turning & Face Copying: Runs smoothly toward the tailstock or handles distinct reverse spindle turret layouts on multi-axis turning setups.
- High-Feed Heavy Roughing Loops: Removes large amounts of stock easily from rough castings, forged steel blanks, and welded structural faces.
- Complex Convex Profiling: Offers clean directional approach geometry for machining spherical rollers, ball-seat joints, and custom architectural tooling profiles.
5. Machine Tool & Equipment Compatibility
Machined to tight dimensional tolerances to ensure fast drop-in integration into standard CNC machine setups:
- Secures directly into 25mm metric static tool pocket blocks, CNC turrets, or standard multi-axis mill-turn centers.
- Fits smoothly on conventional manual lathes outfitted with standard imperial tool posts.
- Fully compatible with Quick-Change Tool Post assemblies (such as the standard QCTP 300 series or CXA tool holder blocks designed for 1-inch shanks).
6. Beyond Insert Grade Selection Matrix
Pair your SRAPL2525M12 holder with the appropriate Beyond carbide insert grade substrate to match your raw material stock:
| Beyond Insert Grade | Coating Architecture | Primary Application Profile | ISO Range Class |
|---|---|---|---|
| BY1030 | CVD Thick TiCN + Al2O3 Multi-Layer | Continuous high-speed turning to medium roughing in carbon steel and hard alloy plates. | P15 - P30 |
| BY2015 | Multi-Layered PVD AlTiN Nano-Coating | High thermal resilience for gummy stainless steels (304, 316) and high-temperature superalloys. | M10 - M25 |
| BY4025 | Heavy PVD Ultra-Tough TiAlN Coating | Heavy interruption, rough casting surfaces, and structural low-speed processing environments. | P30 - P45 / M25 - M40 |
7. Operational Troubleshooting Matrix
Problem A: Fine Surface Chatter or Low-Frequency Vibration
Correction: Large circular profiles require an adequate depth of cut ($Ap$) to push cutting pressures axially into the spindle. Increase your feed rate ($f$) or use highly positive-rake indexable inserts.
Problem B: Premature Flank Wear or Crater Formations
Correction: Elevated linear velocity causes localized friction cooking. Reduce your surface speed ($Vc$) or migrate to a premium CVD multi-layer co-extrusion grade (BY1030).
Problem C: Insert Indexing Shifts or Pocket Movement
Correction: Check if micro-chips or compressed dust have settled underneath the pocket pocket seat. Clean thoroughly with an air gun and replace the M4.0 clamping screw if it shows thread wear.
8. Global Customer Experiences
"Perfect left-hand holder for back contouring" — Raymond J. (United States)
Solid 25mm shank body. Fits our CNC turret perfectly for left-hand back profiling paths on carbon steel rollers. Using with RPMT1204 inserts, it strips off stock with absolutely zero deflection.
"Präzise Plattensitz und hohe Stabilität" — Klaus M. (Germany)
The insert pocket seat is machined cleanly. The 12mm round inserts stay fully locked down and don't micro-rotate during deep profiling cycles. Beyond tool holders offer excellent industrial quality.
"Gambo robusto, ottimo per asportazione pesante" — Stefano T. (Italy)
Very nice matte black finish. Handles rough scale on large cast steel parts easily. Just note that it does not ship with inserts included—you need to buy your RPMT inserts separately.
"圧倒的な剛性とコストパフォーマンス" — Kenji S. (Japan)
The anti-rust black surface treatment is highly durable against hot stringy chips during dry steel roughing. Exceptional price-to-performance ratio compared to premium domestic brands.
"Excellent finish on stainless components" — Malcolm F. (Australia)
We use this holder for running complex back facing steps on 316 stainless pump castings. The 25mm shank coupled with a round insert handles interrupted cuts beautifully without fracturing the carbide edge.
9. Frequently Asked Questions
Q: What is the exact imperial equivalent size for the SRAPL2525M12 left-hand tool holder shank?
A: The metric 25x25mm square dimensions match directly with a standard 1 inch × 1 inch tool holder footprint inside traditional imperial tool posts.
Q: Is this tool holder compatible with both RPMT1204 and RPMR1204 insert styles?
A: Yes! The pocket seat accepts all standard 12mm round inserts featuring a 4.76mm thickness ($S1$), including both RPMT 1204 and RPMR 1204 industrial designations.
Q: What screws and wrench come inside the standard packaging?
A: It uses a high-tensile metric M4.0 × 10mm flathead Torx screw. One screw is pre-installed in the pocket seat, and a matching T15 flag-style driver wrench is included in the box.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.