Bechler AR-25 Multi-Spindle Automatic Lathe
Key Specifications
Number of Spindles
Maximum Bar Diameter
Spindle Speed
Working Positions
Cross-Working
Drive System
Overview
The Bechler AR-25 is a multi-spindle cam-controlled automatic screw machine from Bechler, a Swiss manufacturer with over 100 years of history in precision automatic lathe production. The AR-25 is a 6-spindle rotary transfer machine designed for high-volume production of precision turned parts from bar stock up to 25 mm in diameter. Unlike CNC-based multi-spindle machines, the AR-25 relies on mechanical cam-driven tooling motion, which provides exceptional repeatability and extremely fast cycle times for single-setup parts. The machine handles complex geometries including cross-drilling, milling, and threading through its integrated end-working and cross-working attachments. The AR-25 is widely found in European precision parts manufacturers producing watch components, medical fasteners, aerospace fittings, and automotive precision parts requiring tolerances in the micron range. Bechler machines are known for their ability to maintain sub-micron form accuracy over millions of production cycles with proper maintenance. The company was acquired by Tornos Group in 1995.
Full Specifications
| Parameter | Value |
|---|---|
| Number Of Spindles | 6 |
| Maximum Bar Diameter | 25 mm (0.98 in) |
| Spindle Speed | Up to 5,000 RPM (cam-driven, variable with drive) |
| Working Positions | 6 front + 6 back-working positions |
| Cross-Working | 4 cross-working positions per spindle |
| Drive System | Cam-driven (mechanical, not CNC) |
| Gear Quality Achievable | IT5-IT6 |
| Production Rate | Up to 200 parts/min on simple parts |
| Control | Mechanical cam (no CNC axes) |
| Bar Feed | Magazine bar feed compatible |
Strengths & Limitations
Strengths
- Swiss precision with micron-level repeatability over millions of cycles
- Very high production rates on simple turned parts from bar stock
- Mechanical simplicity — low operator skill requirement once set up
- Well-established in European precision parts industry with large user base
- Large ecosystem of tooling, attachments, and service specialists
Limitations
- Cam-driven — changeover requires cam replacement (4-8 hours minimum)
- Not suitable for complex or variable geometry programs requiring CNC
- 6-spindle indexing limits to 6 discrete operations per cycle
- New machines not manufactured — Bechler production ended; parts and rebuilds through Tornos
Best For
Frequently Asked Questions
01
Bechler was acquired by Tornos Group in 1995. New production of Bechler-brand machines effectively ended, but Tornos Group provides parts, service, and rebuilds. The machines remain widely used due to their longevity.
02
The AR-25 is a cam-driven machine — exceptionally fast and repeatable on dedicated high-volume programs but requiring 4-8 hours to change over between different parts. CNC multi-spindles like the MultiSwiss reprogram in minutes for different geometries but cost significantly more.
03
The AR-25 accommodates bar stock up to 25mm diameter. Bechler offers other AR models (AR-32, AR-40) for larger diameters up to 40mm.
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