Turn Mill Center

Product Overview

The Turn Mill Center integrates high-rigidity turning and high-speed multi-axis milling within a single platform. By consolidating operations that traditionally require separate lathes and vertical/horizontal machining centers, this machine eliminates workpiece re-clamping errors, reduces floor space, and cuts non-cutting cycle times by up to 55 percent.
Built on a Meehanite cast iron bed with finite element analysis (FEA) optimized ribbing, the machine absorbs high cutting forces while maintaining thermal stability during continuous 24/7 production runs.

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Key Features

45-Degree Slanted Monoblock Bed:

Cast in-house using high-grade Meehanite iron, stress-relieved via thermal annealing and vibration aging. The 45-degree layout ensures unimpeded chip evacuation directly into the internal chip conveyor while providing maximum rigidity under heavy radial loads.

Synchronized Sub-Spindle (B-Axis):

Features a built-in liquid-cooled motor spindle capable of full synchronization with the main spindle. Enables zero-point part transfer for complete 6-side machining in a single program cycle.

B-Axis Milling Head:

Driven by a high-torque roller gear cam mechanism, providing continuous indexing from -120 degrees to +120 degrees with hydraulic clamping torque of 3,500 Nm for rigid off-center drilling, contouring, and angled boring.

Direct-Drive C-Axis:

Eliminates gear backlash via a high-resolution ring encoder mounted directly on the spindle nose, achieving contouring precision required for cam profiles and helical interpolation.

Thermal Drift Compensation:

Integrated PT100 temperature sensors monitor thermal growth on the main spindle bearings and ballscrews, feeding real-time compensation data directly into the CNC controller (Fanuc 31i-B or Siemens 840D sl).

Materials & Surface Finishes

Compatible with a broad spectrum of industrial materials. Machine kinematics and torque curves are optimized for:
Aerospace Alloys: Inconel 718, Titanium Grade 5 (Ti-6Al-4V), Waspaloy, Stainless Steel (304, 316L, 17-4PH).
Automotive & General Engineering: Forged alloy steels (4140, 4340), nodular cast iron, aluminum extrusions (6061-T6, 7075-T6), brass, and bronze.
Achievable Surface Finishes:
Turning/Boring: Up to Ra 0.4 um directly from the tool.
Hard Turning (up to 62 HRC): Up to Ra 0.2 um, eliminating subsequent grinding steps for specific component geometries.

Product Range

We engineer four distinct platform sizes to accommodate varying workpiece envelopes, ranging from compact bar-feed components to heavy shaft machining.

Series	Max Turning Diameter	Max Turning Length	Spindle Bore	Main Motor Power	Target Application Scope
TMC-350	350 mm	500 mm	65 mm	15 kW	Small-to-medium precision shafts, medical implants, fittings
TMC-500	500 mm	1000 mm	85 mm	22 kW	Automotive transmission shafts, fluid power valve bodies
TMC-650	650 mm	1500 mm	110 mm	30 kW	Aerospace structural rings, oilfield connectors
TMC-800	800 mm	3000 mm	130 mm	45 kW	Heavy marine drive shafts, large turbine components

Technical Specifications

Specifications represent the standard TMC-500 configuration. Custom spindle options, hydraulic chuck sizes, and steady rests are available upon request.

Technical Parameter	Specification Value	Unit
Max Swing Over Bed	620	mm
Max Turning Diameter	500	mm
Max Machining Length	1000	mm
Main Spindle Nose	A2-8	-
Main Spindle Speed Range	35 - 4,000	RPM
Main Spindle Motor Power (Cont./30 min)	18.5 / 22	kW
C-Axis Resolution	0.001	degree
Sub-Spindle Stroke (B-Axis/Z2)	1,050	mm
Live Tooling Speed Range	6,000	RPM
Live Tooling Motor Power	7.5	kW
Tool Magazine Capacity	40 (BT40 / HSK-A63)	tools
X/Z/Y Axis Travel	320 / 1,050 / +/- 65	mm
X/Z Axis Rapid Traverse	30 / 36	m/min
Positioning Accuracy (ISO 230-2)	X: 0.005 / Z: 0.008	mm
Repeatability Accuracy	X: +/- 0.002 / Z: +/- 0.003	mm
Machine Weight	9,800	kg

Applications

01.

Aerospace:

Turbine shafts, actuator housings, landing gear pins, and structural brackets requiring multi-axis simultaneous profiling.

02.

Medical Devices:

Spinal fixation screws, orthopedic bone plates, and surgical instrument shafts machined from cobalt-chrome and titanium.

03.

Oil & Gas:

Downhole drilling tool connectors, valve spools, and sucker rod couplings requiring deep-hole boring and heavy thread cutting (API / Acme threads).

04.

Automotive:

Transmission output shafts, constant velocity joint (CVJ) components, and high-pressure fuel rail fittings.

Quality Control & Inspection

Every turn mill center undergoes a strict verification protocol before factory dispatch, complying with ISO 230 standards:

Laser Interferometer Calibration: Linear positioning and repeatability accuracy tested and mapped across all axes using Renishaw laser measurement systems.

Ballbar Circularity Test: Dynamic interpolation accuracy verified under high feed rates to detect and eliminate servo lag or mechanical backlash.

Spindle Dynamic Balancing: Main and sub-spindles dynamically balanced to G1.0 grade at maximum RPM to minimize vibration and maximize tool life.

72-Hour Thermal Run Test: Continuous dry-run operation monitoring bearing temperature stabilization, hydraulic pressure stability, and electrical load variance.

Test Cut Report: A standard NAS 979 or customer-provided test part is machined on-site to verify geometric tolerances, roundness, and surface finish before sign-off.

Custom Manufacturing Process

Application Review & Part Analysis: Our engineering team reviews customer-submitted STEP/IGES files, production volume requirements, and tolerance callouts to select the optimal machine model, turret configuration, and tooling package.

Turnkey Fixturing & Tooling Design: Custom hydraulic chuck jaws, steady rests, bar feeders, and live tooling holders are engineered and simulated using CAM software prior to floor assembly.

Machine Assembly & Alignment: Precision scraping of guide ways, installation of pre-loaded roller guideways (Rexroth/THK), and precision ground ballscrews (NSK).

CAM Post-Processor Integration & Trial Run: Generation of customized post-processors for standard CAM suites (Mastercam, NX, ESPRIT) followed by dry-run testing and initial sample production.

Customer Acceptance (FAT): Factory Acceptance Testing conducted at our facility, where customer engineers inspect trial components and verify machine performance against agreed parameters.

Technical Support & After-Sales Service

Installation & Commissioning:

Factory-certified service engineers supervise on-site leveling, utility hookups, and final geometric alignment at the customer's facility.

Operator & Programmer Training:

Comprehensive 5-day on-site training covering G-code programming, conversational setup, maintenance routines, and collision recovery.

Spare Parts Availability:

Critical wear items—including servo drives, spindle cartridges, hydraulic valves, and telescopic covers—are stocked in regional warehouses for immediate dispatch.

Remote Diagnostics:

Secure Ethernet/IoT connection module enables our application engineers to log into the CNC control remotely for rapid troubleshooting and parameter adjustment.

FAQ

Q: What CAM software packages are fully compatible with your Turn Mill Center control systems?

A: Our machines run on standard Fanuc 31i-B or Siemens 840D sl controls. We supply validated post-processors for Mastercam, Siemens NX, ESPRIT, and TopSolid. For complex 5-axis simultaneous contouring or multi-channel synchronization, our application team provides custom post-processor templates and simulation models.

Q: Can the machine handle bar stock feeding alongside secondary operations via sub-spindle?

A: Yes. The configuration includes a hydraulic bar feeder interface (compatible with standard hydrodynamic bar feeders up to 1,500 mm or 3,000 mm lengths). The main spindle processes the bar, the sub-spindle catches the cut-off part, transfers it, and the back-working tools machine the rear face in a continuous cycle without manual intervention.

Q: What is the lead time for standard models versus custom turnkey configurations?

A: Standard stock models equipped with standard 12-station turrets and hydraulic chucks typically ship within 6 to 8 weeks. Custom turnkey systems—requiring specialized sub-spindles, customized tool magazines, specialized boring bars, or automated robot loading cells—generally require 12 to 16 weeks, depending on fixture validation phases.

Q: What warranty coverage and service response times are included with the equipment?

A: The machine comes with a standard 12-month warranty covering all mechanical, electrical, and hydraulic components from the date of final acceptance (FAT/SAT). For technical inquiries, our engineering support desk guarantees an initial response within 4 hours, with on-site technician dispatch scheduled within 24 to 48 hours for critical downtime issues.

Request a Quote

To configure a Turn Mill Center tailored to your specific component tolerances and production volume, please provide the following details to our engineering sales team:
Component Part Drawing / STEP File: (Include tolerance callouts and annual production volume).
Material Specification: (e.g., Titanium Gr.5, AISI 4140, 316L Stainless Steel).
Required Automation: (e.g., Bar feeder, gantry loader, or standalone manual load).
Target Delivery Date & Destination Port / Factory Location.

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