Unisig spindle and motor spindle repair
Brochexpress is an independent workshop specialising in the repair, maintenance and diagnostics of Unisig spindles and motor spindles — the American manufacturer founded in 1973, a benchmark in deep hole drilling machines (gundrilling, BTA) for aerospace, medical and energy industries.
Unisig, the American benchmark in deep hole drilling since 1973
TLDR: Unisig, a division of Entrust Manufacturing Technologies (Menomonee Falls, Wisconsin, United States, a precision manufacturer since 1973), is one of the largest producers of deep hole drilling machines in the world, with capabilities covering holes from less than 1 mm to 1 metre in diameter, at depths from a few centimetres to more than 20 metres.
Unisig, a division of Entrust Manufacturing Technologies founded in 1973 in Wisconsin, has established itself as one of the largest producers of deep hole drilling machines in the world, with recognised expertise in technology, innovation, support and service. The manufacturer offers the complete deep hole drilling system — machines, tooling and automation — for customers ranging from small workshops looking to extend their capabilities through to large equipment manufacturers needing to drill millions of holes. Unisig machines cover drilling diameters from less than 1 mm to 1 metre, at depths from a few centimetres to more than 20 metres, with capabilities including BTA drilling, gun drilling, boring and counterboring, pull boring, trepanning, skiving and roller burnishing, and bottom-of-hole finishing. These machines equip a very wide range of sectors: aerospace, energy, oil and gas, defence, automotive, hydraulics, medical and mould making.
A range of counter-rotating spindles for high-precision straight drilling
TLDR: Unisig deep hole drilling machines, such as the UNE series, use a tool spindle and a workpiece spindle running in counter-rotation, a configuration that improves the straightness of the drilled hole, with capabilities down to 0.8 mm in diameter for depth-to-diameter ratios exceeding 100:1.
On gun drilling machines dedicated to small diameters (UNE series, including the UNE6 model), the tool and the workpiece rotate in opposite directions, a configuration that significantly improves the straightness of the drilled hole — these machines can produce holes from 0.8 to 6.0 mm in diameter, with depth-to-diameter ratios above 100:1, including in medical-grade materials that are particularly difficult to machine. On production machines of the UNI series, designed for high accuracy at high volumes, the spindle is combined with automation systems (conveyors, robotics) for optimal production, with options for blind hole drilling, BTA drilling, or a combination of both processes depending on the application. The in-house workshop at Unisig manufactures the critical components of every machine, guaranteeing geometric accuracy and axis positioning at the highest levels the sector demands.
Unisig spindles and motor spindles covered (non-exhaustive list)
- Counter-rotating tool and workpiece spindles, UNE series (gundrilling)
- Spindles of BTA production machines, UNI series
- Small diameter spindles (from 0.8 mm), medical applications
- Spindles used with robotic automation systems
- Spindles of 5-axis mill-drill centres for mould making
Interfaces and specifications
The Unisig spindles and motor spindles we repair cover drilling diameters from **0.8 mm to 1 metre**, at depths that can exceed **20 metres** and depth-to-diameter ratios above 100:1 on the most demanding configurations — exact specifications to be confirmed on quotation according to the reference of your machine.
Our expertise on your Unisig spindles and motor spindles
TLDR: Brochexpress works across the entire life cycle of your Unisig 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 drilling line
Full diagnostics
- Inspection of clearances, balancing, bearing condition, sealing and the tool/workpiece counter-rotation synchronisation, with a detailed technical report
Preventive and corrective maintenance
- Maintenance programme tailored to the production rates of the aerospace and medical 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 Unisig spindles and motor spindles
- An independent workshop, with no capital ties to manufacturers, guaranteeing an objective diagnosis
- Expertise in tool/workpiece counter-rotating spindles and small diameter 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 counter-rotating spindles of UNE series gundrilling machines?
Yes, we work on these spindles, taking care to preserve their opposed rotation synchronisation.
Do you work on small diameter spindles (from 0.8 mm) for medical applications?
Yes, we diagnose and repair these spindles, taking into account their extreme precision requirements.
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 of UNI series BTA production machines?
Yes, we diagnose and repair these spindles, including on automated configurations.
Do you offer a preventive maintenance contract for a fleet of Unisig machines?
Yes, we set up preventive maintenance programmes tailored to your production rate.
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 Unisig spindles and motor spindles — spindles of deep hole drilling 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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Unisig® is a registered trademark of Entrust Manufacturing Technologies, Inc.. Brochexpress is neither affiliated with, nor a partner of, nor an authorised distributor of Entrust Manufacturing Technologies, Inc.. 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).