Haas CNC MAC-1 Induction Proximity Limit Switch — P/N 32-2042 / 61-2125A

Haas · CNC Machine Tool Spare Part · Magnetic Proximity Sensor · In stock

The Haas MAC-1 is a magnetic / induction proximity limit switch used as a field-replaceable spare on Haas CNC lathes and machining centers (typical fit: SL-20, SL-30, ST-20, VF-2, VF-4, Mini Mill, etc.). Reference part numbers 32-2042 and 61-2125A cover the original OEM MAC-1 style body used by Haas for tool turret position detection, axis travel-limit homing, ATC arm position feedback, and door-interlock signalling. Sourcing one or two spares locally cuts a multi-week Haas OEM lead time down to a single inbound shipment — a meaningful saving for any shop running a 24/7 spindle utilization schedule.

The MAC-1 is a non-contact, solid-state proximity switch — a ferrous target passing the face of the sensor changes its internal oscillator and trips the output. It is wired as a discrete input to the machine’s I/O block, the same kind of point that a Siemens SIMATIC S7-200 SMART digital input or a Mitsubishi MELSEC input card reads. KOEED stocks MAC-1 equivalents alongside the broader CNC / PLC spare-part portfolio so you can ship a single replacement switch without spinning up a separate procurement ticket.

Key Specifications

Datasheet Highlights

• Non-contact inductive sensing — no mechanical lever or roller to wear, no contact bounce, suitable for high-cycle tool-changer and ATC arm feedback where mechanical micro-switches would fail within months.
• Solid-state output, 10–30 VDC supply — designed to drop into a Haas 24 VDC discrete-input rail and interface directly with the machine’s main I/O PCB or remote I/O Link (Fanuc-style I/O Link on most Haas CNC controllers — see Fanuc CNC spare parts for related I/O Link modules).
• Sealed barrel housing — tolerates cutting-fluid splash and chip contamination typical of a CNC envelope; the same IP class of cylindrical proximity switch is widely used on Siemens SIMATIC ET200 decentralized I/O stations and on Yaskawa MP controller cabinets.
• Drop-in mechanical fit to the MAC-1 footprint — thread, length, and connector pattern match the original 32-2042 / 61-2125A reference so a swap does not require bracket rework or harness re-termination.
• Two reference part numbers covered — 32-2042 and 61-2125A are commonly used interchangeably in Haas parts lists for the same physical switch position; confirm against your machine’s electrical drawing before ordering.

Typical Applications

• Tool turret position detection on Haas slant-bed lathes — SL-20 / SL-30 use MAC-1 switches to confirm each turret station is indexed to the spindle face before a turning cut is initiated; a failed switch halts cycle-start on the Haas / Fanuc CNC controller with a turret-position alarm.
• Axis travel-limit homing on VMC and HMC — the MAC-1 at each end of X / Y / Z travel tells the controller it has reached the home dog; a sticky or open switch puts the machine into a soft-fault state at power-up.
• ATC arm position feedback — confirms the automatic tool changer arm is fully retracted, fully extended, or rotated to the tool-pocket position; a worn switch produces random tool-change alarms on the operator panel.
• Door interlock and safety guard — the MAC-1 is used as a sliding-door interlock on enclosed work envelopes, in the same role that an Omron D4NS safety-door switch plays on a guarded robotic cell.
• Pallet-changer confirm and work-coord probe dock — on EC / GR / MDC-series pallet and gantry machines, MAC-1 switches confirm pallet up / down and probe-parked positions.
• Refurbishment of imported CNC — a North-American refurbisher tearing down, cleaning, and reshipping a 10–20 year-old Haas machine typically replaces every MAC-1 on the machine as part of recommissioning; a single procurement ticket covers the lot.

Related Modules & Cross-Reference

The MAC-1 is a passive, non-contact switch, but it does not work in isolation — it sits on the I/O bus of a CNC controller and on the cabinets of the broader automation stack. The table below maps the MAC-1 to the surrounding modules most often requested alongside it, drawn from KOEED’s nine-brand matrix (Allen-Bradley, Siemens, Mitsubishi, Omron, Fanuc, Schneider, Yaskawa, Panasonic, KEYENCE).

Why bundle these on one ticket? A single MAC-1 that fails in the middle of a shift is rarely the only spare you need. The surrounding factory-automation stack — the Fanuc I/O Link module, the Allen-Bradley POINT I/O block that mirrors turret position, the safety-door interlock, the HMI panel that surfaces the alarm — all live on the same procurement path. Sourcing them through KOEED means one BOM, one quote, one consolidated shipment rather than three or four separate tickets to three or four separate vendors.

Warranty & Authenticity

• Functionally tested before shipment — each MAC-1 is checked for switching threshold, output rise / fall, and housing seal before it leaves the bench.
• Worldwide shipping — DHL / FedEx / UPS from our Shenzhen and Hong Kong base to North America, Europe, the Middle East, Southeast Asia and South America.
• Quote within 24 hours on business days — send your part list or BOM and you will get stock status and price back the same business day.
• Cross-reference help — if the part number on your machine does not match 32-2042 or 61-2125A exactly, send a photo of the data plate and the machine serial; we will cross-reference it against the Haas parts list and propose a direct equivalent.
• Independent multi-brand distributor — KOEED is an independent industrial-automation sourcing partner, not an OEM subsidiary of Haas, Fanuc, or any other brand on this page. We supply parts, cross-references, and a single BOM-level quote.