Sunnen spindle and motor spindle repair
Brochexpress is an independent workshop specialising in the repair, maintenance and diagnostics of Sunnen spindles and motor spindles — the American manufacturer founded in 1924 in St. Louis, a world leader in honing machines for sizing and finishing bores.
Sunnen, world leader in honing since 1924
TLDR: Sunnen Products Company (St. Louis, United States, founded in 1924 by Joe Sunnen) is the largest integrated manufacturer in the world of bore sizing and finishing systems using honing, with a range covering manual machines through to fully automated single or multi-spindle systems.
Founded in 1924 in St. Louis by Joe Sunnen, who invented the first manual cylinder hone to allow garages to reclaim their engine bores, Sunnen Products Company has become the largest integrated manufacturer in the world in industrial bore sizing and finishing. The Sunnen range of honing systems extends from basic manual machines through to fully automated systems combining honing, measurement and part handling, with horizontal or vertical, single or multi-spindle, standard or customised configurations. The manufacturer also offers tube honing solutions for long, large diameter bores (HTA, HTB and HTC series), as well as machines dedicated to the automotive sector for honing engine blocks and connecting rods.
A range of true running spindles on precision bearings
TLDR: Sunnen honing machines use a "true running spindle", fitted with precision bearings and a direct collet connection, guaranteeing the straightness and concentricity of movement essential to honing accuracy.
On Sunnen horizontal honing machines, such as the SH-5000 model, the true running spindle is fitted with precision bearings and a direct collet connection, combined with automatic size control for high accuracy and consistency of results. This spindle design, refined over nearly a century of experience, ensures that the rotary and reciprocating movement of the honing mandrel — the combination characteristic of the honing process — remains perfectly straight and concentric, an essential condition for producing bores of optimal roundness and straightness. On tube honing machines (HTA, HTB and HTC series), the spindle is combined with CNC or PLC control with a touch interface for precision honing of long, large diameter bores, with two-axis configurations for small diameters in long parts.
Sunnen spindles and motor spindles covered (non-exhaustive list)
- True running spindles, horizontal machines, SH series
- Tube honing spindles, HTA, HTB and HTC series
- Single and multi-spindle configurations, automated systems
- Spindles of vertical honing machines
- Spindles of machines dedicated to automotive work (engine blocks, connecting rods)
Interfaces and specifications
The Sunnen spindles and motor spindles we repair use a "true running" design on precision bearings, with a direct collet connection — exact specifications (rotation speeds, power ratings) to be confirmed on quotation according to the reference of your machine.
Our expertise on your Sunnen spindles and motor spindles
TLDR: Brochexpress works across the entire life cycle of your Sunnen spindles and motor 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 your honing line
Full diagnostics
- Inspection of clearances, balancing, precision bearing condition, sealing and the collet connection, with a detailed technical report
Preventive and corrective maintenance
- Maintenance programme tailored to the production rates of the automotive and precision engineering industries, 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 Sunnen spindles and motor spindles
- An independent workshop, with no capital ties to manufacturers, guaranteeing an objective diagnosis
- Expertise in true running spindles and single/multi-spindle configurations
- 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 true running spindles of SH series horizontal machines?
Yes, we work on these spindles, taking their direct collet connection into account.
Do you work on tube honing spindles of the HTA, HTB and HTC series?
Yes, we diagnose and repair these spindles, which are suited to long, large diameter bores.
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 multiple spindles of automated Sunnen systems?
Yes, we diagnose and repair each of the spindles in these configurations.
Do you offer a preventive maintenance contract for a fleet of Sunnen machines?
Yes, we set up preventive maintenance programmes tailored to your production rate, particularly relevant for the automotive industry.
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 Sunnen spindles and motor spindles — spindles of honing machines — with the responsiveness and rigour demanded by the most exacting industrial environments.
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.
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Sunnen® is a registered trademark of Sunnen Products Company. Brochexpress is neither affiliated with, nor a partner of, nor an authorised distributor of Sunnen Products Company. 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).