Haas spindle repair
Repair of VF and UMC cartridges and ST turning spindles.
Parts by brand
Haas designs its machines for fast unit replacement: the spindle of a vertical machining centre is a cartridge that is removed and fitted as a whole. That is a real advantage when the right part is at hand. We source cartridges, drawbars, unclamp pistons, belts and encoders for Haas machines, check them in our workshop in Germany and ship them to you.
Series and assemblies
VF vertical centres and the compact Mini Mill use 40-taper spindles (CAT40 or BT40) in several versions: belt-driven, direct-drive (inline) and, on larger models, with a two-speed gearbox. UMC five-axis machines share the spindle design but run long cycles under higher load, so bearings and drawbar need attention more often.
ST lathes have a main spindle with an A2-5, A2-6 or A2-8 flange nose, belt drive and spindle encoder, plus a hydraulic chuck cylinder. A typical Haas feature is the pneumatic tool release piston (TRP), which together with the drawbar disc springs determines clamping reliability.
New, reconditioned or exchange cartridge for your VF or UMC model.
Drawbar, disc springs, collet, TRP release piston and its seals.
Main spindle bearings, encoders, pulleys, belts and seals.
Haas spindle motors and their bearings, replaced or overhauled with a winding check.
How to order
The machine serial number is the most precise reference for a Haas spindle configuration: it defines speed, taper and drive type.
Send a photo of the machine plate and of the screen showing the software version. The spindle cartridge has its own plate, so photograph that too.
We check the configuration and select a cartridge or individual parts: new original, equivalent-quality part or reconditioned unit.
You receive the options with prices; availability and delivery time are confirmed after your enquiry.
The cartridge is run in and shipped, or we work on your own cartridge in our workshop, for example with new bearings.
Why us
We source original and equivalent parts for European Haas versions.
Before dispatch we measure taper runout and run in the spindle.
Where it makes more sense, we replace bearings and springs in your own cartridge.
Courier or freight forwarder to any address; worldwide on request.
Related pages
Before ordering a new cartridge, it is worth assessing a repair of the existing one. It is often the fastest option.
Repair of VF and UMC cartridges and ST turning spindles.
New, reconditioned and exchange spindle units.
Drawbars, springs and collets for CAT and BT tapers.
Spindle encoders and position sensors.
FAQ
Check the air pressure and the condition of the TRP piston; often the drawbar springs are fatigued. We select a repair kit or a complete drawbar.
Changing the spindle type involves the motor, drive and parameters. We tell you what such an upgrade requires for your model.
The taper (CAT or BT) and other details can differ. We identify parts by the serial number of your machine.
The price depends on the option: new, reconditioned or exchange. After identification you receive a quote with prices.
Request
Send photos of the machine plate and the spindle cartridge plate. We reply with options and ship across Europe and worldwide.
Scope
Every operation below is done in our own workshop in Germany. Follow a link for what it involves and what we need from you.
Machine brand
We are independent and work with spindles of every builder. These are the makes whose spindles come across the bench most often.
Quote
Tell us the machine model, the spindle type and what the machine is doing wrong. We come back with an initial assessment and a written quote before any work begins.