Beyond SCGCL2525M12 Left Hand Indexable Turning Tool Holder 25x25mm
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⚠️ TECHNICAL NOTICE: The carbide insert shown installed on the toolholder is for visual demonstration purposes only. All indexable cutting inserts are sold separately.
BEYOND SCGCL2525M12 Left-Hand Indexable Turning Tool Holder
Industrial 25x25mm Square Shank | 91° Lead Angle for Heavy-Duty CNC Left-Hand Facing and Longitudinal Turning
1. Product Overview
"Which toolholder provides maximum pocket stability and 91-degree clearance for heavy-duty left-hand external roughing and facing on medium-to-large CNC lathes?"
The Beyond SCGCL2525M12 indexable external turning toolholder is specifically engineered for high-volume industrial cutting schedules. Utilizing a robust screw-on clamping system, it delivers superior vibrational dampening and deflection resistance under intense depths of cut. It is optimized to seat industry-standard CCMT1204 / CCGT1204 (CCMT 43.x) carbide inserts. When paired correctly, the toolholder enables the insert's advanced chipbreaker geometry and specialized multi-layer PVD/CVD coatings to function flawlessly—ensuring positive cutting action, minimal thermal load on the cutting edge, and precise dimensional control.
2. Core Performance Advantages
- Heavy-Duty Alloy Steel Core: Forged from premium, heat-treated alloy steel (HRC 42-45) to resist extreme cutting forces and withstand severe structural stress during roughing operations.
- 91° Lead/Approach Angle: Tailored specifically for side-turning and facing applications close to shoulders, redirecting forces for optimal chip evacuation and low chatter risk.
- Micron-Precise Pocket Seating: Pocket dimensions are CNC ground to ultra-tight tolerances, preventing insert rotation or micro-shifting over massive batch production cycles.
- Anti-Corrosive Premium Coating: Finished with an industrial black oxide treatment to withstand highly harsh water-soluble cutting fluids, synthetic lubricants, and extreme cooling environments.
ISO Designation & Nomenclature Decoding
S — C — G — C — L — 25 — 25 — M — 12
| S | Clamping Method: Screw-On Mechanism for high clearance and simple indexability |
| C | Insert Shape: Rhombic 80° Design |
| G | Approach Angle: 91° Lead Angle for side turning and facing profiles |
| C | Insert Clearance Angle: 7° Normal Relief Angle |
| L | Tool Hand: Left-Hand Direction Cutting Mode |
| 25 | Shank Height: 25 mm Metric (0.984" / Approx. 1" Equivalent) |
| 25 | Shank Width: 25 mm Metric (0.984" / Approx. 1" Equivalent) |
| M | Toolholder Length: 150 mm Total Length (5.905" Equivalent) |
| 12 | Cutting Edge Length: Approx. 12 mm for CCMT1204 / CCGT1204 (ANSI 43.x) Inserts |
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3. Technical Specifications & Dimension Cross-Reference
Metric vs. Imperial Inch Sizing Equivalency
| Metric Model Code | ANSI/Imperial Equivalent | Shank Dimension (H x W) | Overall Length (OAL) | Hardware Fastener Specs |
|---|---|---|---|---|
| SCGCL2525M12 | SCGCL 16-4D | 25 x 25 mm / 0.984" x 0.984" | 150 mm / 5.905" | Screw M4.0 x 10mm / Key Torx T15 |
Recommended Lathe Turning Speed & Feed Rates
| Workpiece Material Type | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon & Alloy Steel (P) | 160 - 320 m/min (525 - 1050 SFM) | 0.12 - 0.45 mm/rev (0.005" - 0.018" IPR) | 0.50 - 4.5 mm (0.020" - 0.177") |
| Stainless Steel (M) | 90 - 180 m/min (295 - 590 SFM) | 0.10 - 0.35 mm/rev (0.004" - 0.014" IPR) | 0.40 - 3.5 mm (0.016" - 0.138") |
| Gray & Nodular Cast Iron (K) | 110 - 240 m/min (360 - 785 SFM) | 0.15 - 0.50 mm/rev (0.006" - 0.020" IPR) | 0.60 - 5.0 mm (0.024" - 0.196") |
4. Applications & Equipment Compatibility
The SCGCL2525M12 toolholder is an essential standard component for large-diameter external structural processing. Its left-hand profile layout is explicitly optimized for back-turning parameters or face-profiling cycles toward the lathe spindle on high-torque machine centers.
5. Beyond Carbide Grade Matrix & Equivalents
| Beyond Grade | Coating Architecture | ISO Application Target | Brand Equivalent Benchmarks |
|---|---|---|---|
| BY2015 | Multi-Layer CVD TiN / Al2O3 / TiCN | ISO P10 - P25 | Sandvik GC4315 | Kennametal KCP10B | Walter WPP10S |
| BY4025 | Thick Thermal Al2O3 CVD Film | ISO P20 - P40 / M20 - M35 | Sandvik GC4325 | Kennametal KCP25B | Walter WPP20S |
| BY5030 | Nano-Structured PVD TiAlN Layer | ISO M10 - M30 / ISO S10 - S25 | Sandvik GC1115 | Kennametal KSS20M | Iscar IC807 |
6. Machinist Troubleshooting Guide
Symptom: Plastic Pocket Swelling or Insert Micro-Rotation
Root Cause: Torque limits exceeded via locking screw or extreme feed load during heavy scaled cuts.
Action Plan: Verify clean metal contact inside the ground pocket slot. Ensure the M4.0 screw is clamped with a calibrated Torx wrench. Replace screw periodically if fatigue marks show.
Symptom: Immediate Tip Fracture on Interrupted Material Passes
Root Cause: Selecting a carbide grade that is too brittle, or inadequate coolant distribution causing thermal shock cracks.
Action Plan: Switch over to tough-matrix grade BY4025 and ensure copious flood cooling or deep high-pressure emulsion jet delivery directly on the cutting edge zone.
7. Why Choose Beyond Tools?
Beyond manufactures high-grade, standard-compliant ISO indexable cutting tools. By stripping away standard retail distributor markups, we pass heavy structural reliability and strict dimensional precision down onto global shop floors.
Verified Global Client Experiences
"Running this on our Mazak for heavy flange facing. The 25mm shank is completely rigid. Taking a 4mm depth of cut in 4140 steel easily without chatter. Exceptional value."
"Very clean finish on the ground pocket surfaces. The geometry index is exactly spot on. Holds dimensional sizes within microns over continuous production."
"Ottimo gambo da 25mm. Strong black-oxide layer has held up perfectly against heavy chip wash over three weeks of non-stop shifts."
"Pocket tolerance and screw alignment are perfect. Holds standard global CCMT 432 inserts with rigid locking."
8. Frequently Asked Questions
Q: What is the mechanical difference between SCGCR and SCGCL configurations?
A: The ending code defines the structural direction of the toolholder pocket. This SCGCL model is a Left-Hand version designed to face or cut toward the chuck under forward rotation, or work within specific back-turning setups. The SCGCR is its right-hand mirrored equivalent.
Q: Can I use standard ANSI inch-coded inserts with this metric toolholder body?
A: Yes. ISO standard metric CCMT1204.. shapes and ANSI inch CCMT 43.x.. models maintain identical thickness, width, and angle profiles. They lock cleanly into this pocket footprint with absolute zero offset.
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.