Renishaw BT50-OMP400 Probe Holder — BT50 Taper Shank for OMP400 Optical Probe

Renishaw · OMP400 Series · BT50 ISO Taper · CNC Touch Probe Holder

The Renishaw BT50-OMP400 is a precision BT50 ISO taper shank holder designed to mount the OMP400 optical machine probe in the spindle of a CNC machining center. Machined from hardened tool steel with a balanced BT50 (ISO 50) taper, the holder keeps the OMP400 stylus on a stable, repeatable axis so the probe can perform in-cycle workpiece measurement, datum setting, and part-offset compensation on 5-axis mills. The BT50-OMP400 is sourced by KOEED as part of our Fanuc, Siemens and Mitsubishi CNC support line, and is in stock for fast worldwide shipping.

Engineered for use on machine tools running controllers from Allen-Bradley, Omron, Schneider, Yaskawa, Panasonic and KEYENCE ecosystems as well, the BT50-OMP400 turns a spindle into a metrology-grade measurement platform without pulling the part off the machine.

Key Technical Specifications

Application Scenarios — Where the BT50-OMP400 Fits

The BT50-OMP400 is built for heavy-duty 5-axis CNC machining centers where the OMP400 probe has to enter the spindle like a normal cutting tool and survive a full day of in-cycle measurement. Common deployment sectors include aerospace structural components, automotive powertrain and body-in-white cells, precision mold & die work, and medical implant manufacturing. Engineers at integrators running Fanuc, Siemens SINUMERIK and Mitsubishi M80 controllers reach for this holder when the workpiece cannot leave the machine between roughing and finishing, or when regulatory batches require 100 % in-process dimensional verification.

• Aerospace machining — long-reach 5-axis profiling of wing ribs, blisks and structural fittings where the part is too large to move to a CMM.
• Automotive cell-line integration — in-cycle datum and offset compensation on mill-turn and mill-drill cells typically controlled by Allen-Bradley or Siemens PLCs.
• Mold & die finishing — cavity depth and contour verification between semi-finish and finish passes on hardened die steel.
• Medical implant production — small-batch titanium and cobalt-chrome parts where every lot needs traceable in-machine measurement evidence.
• Vision-assisted cells — shops using KEYENCE vision for post-process inspection can feed probe coordinates into the same QC flow.
• Energy & heavy machinery — large impellers, turbine blades and gearbox housings machined on BT50 horizontal or 5-axis borers.

Browse the full KOEED industrial automation catalog or jump straight to the brand index for controller, drive and HMI options that pair with this holder.

Integration & Wiring Notes

The BT50-OMP400 itself is a mechanical holder — it carries no electrical signals. All probe signaling flows through the OMP400’s internal batteries and the Renishaw OMM (or OMI) optical receiver mounted on the machine envelope. The receiver converts the probe’s modulated infrared pulses into a discrete skip / probe-triggered signal that the CNC interprets as a probing event. The receiver’s M-code output is wired to the controller’s fast input; for Fanuc, Siemens and Mitsubishi CNC platforms this is normally a dedicated skip input (e.g. X4.7 on Fanuc 0i-MF / 30i-B, DI 16 on SINUMERIK 840D sl, or the SPI input on Mitsubishi M80). The OMP400’s on/off state is selected by the same infrared beam, which doubles as a start-of-block confirmation.

In a typical cell, the BT50-OMP400 holder is loaded in the same tool magazine as cutting tools, and the OMP400 is treated as just another tool with a defined length and diameter offset. When the OMP400 is called by the part program the spindle orients, the holder enters the spindle, and the controller switches on the optical receiver ahead of the probing move. After measurement, the receiver is turned off and the OMP400 can stay in the spindle or be returned to the magazine. When the OMP400 is not fitted, the BT50-OMP400 holder can be used as a BT50 “blank” storage position to keep the magazine balanced, but it must be cleaned and the stylus guarded before any cutting move.

Designers using Omron CP1 / CJ2 PLCs or Schneider Modicon M340 / M580 to read the probing result into a line-side MES usually latch the skip signal through a high-speed counter module (e.g. Omron CP1H-XA or Schneider BMXEH C-200) and tag the timestamp alongside the workpiece serial number. For motion-heavy cells driven by Yaskawa Σ-7 or Panasonic FP7 PLCs, the OMP400 reading is typically used to feed back into the G-code work offset table, not into the PLC directly.

Installation & Commissioning Tips

• Clean the BT50 taper every time. Wipe both the spindle taper and the holder taper with a lint-free cloth and isopropyl alcohol — swarf under the taper face is the single most common cause of poor run-out and probe noise.
• Use the correct pull-stud. Match the pull-stud (e.g. MAS-BT45° or CAT-style, per machine spec) and torque it to the machine maker’s spec. An under-torqued pull-stud lets the OMP400 shift axially and ruins repeatability.
• Set the tool-length offset carefully. Touch the OMP400 stylus with the same method you would for a cutting tool and re-measure offset every time the stylus is changed. Renishaw’s recommended stylus length should be respected to keep the trigger force predictable.
• Verify optical line of sight. The OMM / OMI receiver must have a clear IR view of the spindle window. With a 5-axis head, check probe triggering at every head orientation used in the part program — blind spots are common at A-axis ±90°.
• Calibrate the probe on the machine. Run a full Renishaw datum sphere calibration after installation and again after any spindle, ball-screw or head collision event. Store calibration in the controller’s permanent offset table.
• Plan battery changes. OMP400 batteries last many shifts but not forever. Add a low-battery M-code to the part program and log battery state to your KOEED AI Diagnostic Tool workflow if you have one.
• Train operators on collision recovery. A crashed stylus is the #1 cause of in-cycle measurement drift. Replace the stylus as a complete assembly; do not bend and re-use.

If you are migrating from a CAT40 or HSK-A63 holder to BT50, KOEED can cross-reference machine-side error codes and suggest an equivalent OMP60 / OMP400 family member.

Procurement, Warranty & Lead Time

The BT50-OMP400 is supplied by KOEED as an independent multi-brand industrial-automation distributor (China sourcing company with Shenzhen + Hong Kong operations). We are not a Renishaw OEM subsidiary — we source the part through vetted channels and ship worldwide via DHL, FedEx or UPS. Every unit is visually inspected and run-out checked before dispatch; we do not publish fixed retail pricing because B2B pricing depends on quantity, lead time and Incoterm. Send your BOM to Moritta@KOEED.COM and you will get availability, an indicative price and a shipping ETA within 24 business hours.

Typical lead time for the BT50-OMP400 is 3–7 business days ex-stock for single-unit orders and 2–4 weeks for 10+ unit batches, depending on the upstream Renishaw channel at the time of inquiry. Warranty is 12 months from invoice date against manufacturing defects; the warranty does not cover stylus crash damage, incorrect pull-stud torque or operator misuse. For long-running production lines, we can hold a buffer stock under a stocking agreement — ask our team about a forecast-based BOM quotation.

Engineers who want a fuller picture of how this holder ships can browse the real-time sales records and the latest delivery updates. For new builds, KOEED can also support the wider contact channel with controller, drive, HMI and cabling from Allen-Bradley, Siemens, Mitsubishi, Omron, Fanuc, Schneider, Yaskawa, Panasonic and KEYENCE in the same shipment.