SIP spindle and motor spindle repair
Brochexpress is an independent workshop specialising in the repair, maintenance and diagnostics of SIP (Société Genevoise d'Instruments de Physique) spindles and motor spindles — the historic Swiss manufacturer founded in 1862, a world pioneer of the jig borer, with hydrostatic spindles renowned for micrometric runout.
SIP, Swiss pioneer of the precision jig borer since 1862
TLDR: SIP (Société Genevoise d'Instruments de Physique, founded in 1862 in Geneva by Auguste de la Rive and Marc Thury) began with physics and optical instruments before developing thread grinders from 1908 and, from 1919, the first jig borers — a machine category in which it remains a historic world benchmark.
Founded in 1862 in Geneva, SIP began by making physics and optical instruments, developing for its own accuracy needs a dividing machine for engraving scales, then measuring and standard-comparison machines. The manufacturer's first jig borer dates from 1919, with a watchmaker's jig boring machine allowing holes to be located and spotted before drilling and boring on other machines. The first industrial machine, the MP-4, followed.
A range of very high precision spindles with hydrostatic guidance
TLDR: SIP jig borers use hydrostatic spindles of up to 130 mm in diameter, with runout of the order of 1 µm, and rotation speeds continuously adjustable from 25 to 5,600 rpm depending on the configuration.
SIP precision jig borers, such as the Hydroptic 6A and 7A, use hydrostatic spindles of up to 130 mm in diameter, with exceptional runout of the order of 1 to 1.1 µm, guaranteeing sub-micron drilling and boring accuracy. Spindle speed is continuously adjustable, typically from 25 to 5,600 rpm depending on the configuration, with SF 32 spindle mounting on certain models. Hydraulic weight and load compensation completes the design.
SIP spindles covered (non-exhaustive list)
- Hydrostatic drilling/boring spindles, up to 130 mm in diameter
- SF 32 mounted spindles, continuously variable speed 25-5,600 rpm
- Spindles working with Rotoptic rotary heads
- Right-angle head spindles for angular boring configurations
- Spindles of historic double-column jig borers (MP-2P, MP-3K, MP-4G) and the Hydroptic range
Interfaces and specifications
The SIP spindles we repair reach diameters of up to 130 mm, with runout typically of the order of 1 µm and rotation speeds continuously adjustable from 25 to 5,600 rpm — specifications to be confirmed on quotation according to the reference of your machine.
Our expertise on your SIP spindles and motor spindles
TLDR: Brochexpress works across the entire life cycle of your SIP spindles, with the same rigour as for the other brands in our portfolio.
On-site customer service
- Diagnostics and service directly on your machine, in your production workshop, to limit downtime on very high precision equipment
Full diagnostics
- Inspection of clearances, balancing, hydrostatic guideway condition, sealing and spindle runout, with a detailed technical report
Preventive and corrective maintenance
- Maintenance programme tailored to the sub-micron precision requirements of tooling and mould making, together with corrective action in the event of a breakdown
Overhaul and refurbishment
- Grinding, bearing replacement, sealing refurbishment and rotation testing in the workshop, restoring the manufacturer's original tolerances
Why choose Brochexpress for your SIP spindles and motor spindles
- An independent workshop, with no capital ties to manufacturers, guaranteeing an objective diagnosis
- Expertise in hydrostatic spindles with micron runout and Rotoptic heads
- Two service sites: Beaurepaire (France) and Lussery-Villars (Switzerland)
- Support from the first intervention through to return to production
Turnaround and warranty
- On-site service within 48h
- Workshop repair: around 20 working days depending on parts availability
- 12-month warranty on all our repairs
Frequently asked questions
Do you repair the hydrostatic spindles of Hydroptic 6A and 7A jig borers?
Yes, we work on these spindles, taking into account their sub-micron runout requirements.
Do you work on historic SIP jig borers (MP-2P, MP-3K, MP-4G) still in service?
Yes, we diagnose and repair the spindles whatever the age of the machine.
What is the average lead time for a full overhaul?
Allow around 20 working days in the workshop, depending on the condition of the spindle and the availability of parts (bearings, seals, specific components).
Do you work on the spindles used with Rotoptic rotary heads?
Yes, we diagnose and repair these spindles, used for angular boring configurations.
Do you offer a preventive maintenance contract for a fleet of SIP machines?
Yes, we draw up preventive maintenance programmes tailored to how critical this very high precision equipment is.
A reliable partner for your industrial performance
Whether it is an emergency on-site intervention, a full workshop overhaul or a preventive maintenance programme, Brochexpress brings its expertise to your production. As an independent workshop, we work across all SIP (Société Genevoise) spindles and motor spindles — hydrostatic precision jig borers — with the responsiveness and rigour demanded by the most exacting industrial environments: tooling, mould making and high-precision engineering.
Our teams are at your disposal from our sites in Beaurepaire (France) and Lussery-Villars (Switzerland) for a study of your needs, a diagnosis or a personalised quotation.
Request a quoteRelated services
SIP® is a registered trademark of the Société Genevoise d'Instruments de Physique. Brochexpress is neither affiliated with, nor a partner of, nor an authorised distributor of the Société Genevoise d'Instruments de Physique. Our business covers independent repair and maintenance of industrial equipment, permitted under the principle of referential trademark use (EU Trademark Directive 2015/2436 / French Intellectual Property Code, art. L.713-6).