The SDACR1212H07 is a precision right-hand tool holder engineered for external turning, facing, and 90° shoulder machining on mid-sized CNC lathes and Swiss-type machines. Designed for semi-finishing to finishing operations in medium-batch precision production (e.g., automotive sensor shafts, hydraulic valve pins), it pairs exclusively with 80° diamond-shaped CCMT-series carbide inserts (e.g., CCMT070204, CCMT070202) to process materials like carbon steel (10#, 45#), alloy steel (20Cr, 40Cr), and pre-hardened steel (HRC ≤35). Ideal for workpieces with diameters from φ10mm to φ50mm (e.g., precision stepped shafts, connector housings), this tool holder features a 95° approach angle and right-hand cutting direction, delivering low vibration, tight dimensional control (±0.005mm), and superior surface finishes (Ra ≤0.8μm).
Crafted from high-strength alloy steel with micro-precision machined clamping surfaces and a corrosion-resistant black oxide coating, the SDACR1212H07 ensures secure insert fixation and repeatable positioning (≤6μm) between tool changes. Its 12x12mm square shank and optimized 95mm overall length balance rigidity for medium cutting loads (up to 450N) with maneuverability in compact tool turrets—critical for accessing narrow spaces on mid-sized workpieces. Select variants include integrated coolant channels (M4 ports) to target cooling at the cutting zone, extending insert life by 25% in continuous precision machining.
Core Specifications & Design Advantages
1. SDACR1212H07 Coding Breakdown
Following ISO tool holder standards, each character defines critical functional parameters:
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SDACR: Denotes a 95° Right-Hand External Turning Tool Holder with Screw Clamping—breakdown:
- S: Screw clamping system, using M2.5×6 high-tensile screws to lock CCMT07 inserts securely, resisting loosening during high-speed turning of precision parts (e.g., φ15mm 45# steel shafts).
- D: 95° approach angle, optimized for close access to 90° shoulders on stepped workpieces (e.g., φ12mm alloy steel valves) without tool interference, ensuring dimensional accuracy on narrow steps (≤2mm width).
- A: Positive rake angle design, reducing cutting force to minimize deformation of thin-walled components (wall thickness ≤1.5mm)—ideal for fragile precision fittings.
- C: Regular clearance angle (7°), balanced for semi-finishing to finishing of soft-to-medium-hard materials (HB 120-280), ensuring efficient chip evacuation from mid-sized cutting zones.
- R: Right-hand cutting direction, aligning with standard CNC lathe spindle rotation for stable machining of external features like diameters and flange faces.
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1212: Tool holder size code—breakdown:
- First 12: 12mm shank width (square cross-section: 12x12mm), compatible with mid-sized CNC lathes (e.g., Haas ST-15, Mazak QT Nexus 200) and Swiss-type machines with 12mm tool turrets.
- Second 12: 12mm functional height, ensuring precise alignment of the insert’s cutting edge with the workpiece rotation axis—avoiding concentricity errors (≤0.003mm) on precision shafts.
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H07: Insert compatibility & clamping feature—breakdown:
- H: Standard clamping pocket design for CCMT-series inserts with a 7mm inscribed circle diameter (IC=7mm).
- 07: Matches insert thickness specifications, optimized for CCMT070204 (2.38mm thickness) inserts to ensure minimal runout (≤0.002mm) and accurate cutting geometry.
2. Performance for Mid-Size Precision Machining
- Enhanced Rigidity: The 12x12mm square shank delivers 50% higher torsional stiffness than 10mm counterparts, minimizing vibration during medium cutting loads and ensuring stable machining of φ10-20mm thin-walled components—critical for maintaining Ra ≤0.8μm surface finishes on automotive sensors.
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Material Adaptability:
- Carbon steel (10#, 45#): Ideal for right-hand finishing of shafts, with TiAlN-coated CCMT070204 inserts delivering 2,500+ machining cycles before edge wear.
- Alloy steel (20Cr, 40Cr): Handles semi-finishing of precision mechanical fittings, preserving ±0.005mm tolerance even with complex stepped features (e.g., multi-diameter valve pins).
- Pre-hardened steel (HRC ≤35): Performs reliably with wear-resistant carbide inserts, avoiding edge chipping during high-speed turning of miniature tooling parts.
- Note: For HRC >35 hardened steel, upgrade to PCBN inserts and reduce cutting speed by 50% to maintain precision.
- Efficiency in Medium-Batch Production: The screw clamping design enables quick insert changes (≤25 seconds with a T6 wrench), minimizing downtime in medium-batch runs. Coolant channels (where equipped) reduce thermal deformation by 30% and extend insert life by 25%.
Compatibility & Optimal Parameters
1. Insert & Equipment Fit
- Recommended Inserts: CCMT070204 (IC=7mm, thickness=2.38mm) and CCMT070202 carbide inserts (uncoated/TiAlN-coated) for steel; PCBN inserts for hardened materials.
- Machine Compatibility: Fits mid-sized CNC lathes and Swiss-type machines with 12mm square shank tool turrets, suitable for workpieces φ10mm-φ50mm.
- Accessories: Includes T6 wrench for clamping; uses M2.5×6 replacement screws; compatible with M4 coolant adapters (sold separately).
2. Optimal Cutting Parameters
| Material Type | Cutting Speed (m/min) | Feed Rate (mm/rev) | Depth of Cut (mm) | Coolant Recommendation |
|---|---|---|---|---|
| 10# Carbon Steel | 180-280 | 0.06-0.22 | 0.3-2.2 | Low-pressure emulsion |
| 45# Carbon Steel | 150-250 | 0.05-0.20 | 0.2-2.0 | Low-pressure emulsion |
| 20Cr Alloy Steel | 130-230 | 0.04-0.18 | 0.15-1.8 | High-pressure coolant |
| Pre-hardened Steel (HRC 30-35) | 110-180 | 0.04-0.15 | 0.15-1.5 | Synthetic coolant |
Practicality & Quality Assurance
- Durable Precision Build: High-strength alloy steel shank with black oxide coating resists corrosion and wear, extending service life to 10,000+ insert changes—ideal for medium-batch production.
- Micro-Precision Machining: Clamping pocket tolerance (±0.002mm) ensures consistent insert positioning, reducing part variation across batches to ≤0.003mm.
- Protective Packaging: Individual anti-impact box with foam inserts protects precision surfaces and coolant ports during shipping.
- Clear Identification: Laser-marked "SDACR1212H07" for quick selection, avoiding mix-ups with left-hand variants (e.g., SDACL1212H07) or larger holders (SDACR1616H07).
Whether right-hand turning mid-sized carbon steel shafts, semi-finishing alloy steel sensors, or machining precision hydraulic components, the SDACR1212H07 delivers reliable rigidity, CCMT07 insert compatibility, and efficient performance for mid-scale turning operations.