Used Union Horizontal Boring Mills for Sale 36

Union Chemnitz survived every turn of German industrial history by building borers that machine shops refuse to scrap, and the used market reflects that: BFT 90, BFT 110, and BFT 130 table-type machines from multiple decades remain in daily production across Europe. The engineering argument against cheaper Czech alternatives is precision and finish, with Union spindle assemblies and hand-fitted ways traditionally holding tighter geometry over time, which matters for bore alignment work in gearbox and pump housings.

The line logic: BFT and T machines are table-type borers for components in the single-digit tonne class, while P and PR floor-type machines extend into larger fabrications. Many used units sold today carry retrofitted Heidenhain TNC controls on original mechanics, a combination that works well given the underlying iron quality. Pricing for a used Union typically sits above a comparable TOS WHN, the value benchmark of the class, and below Western premium floor borers; that midpoint position suits shops upgrading from worn budget machines without committing to Pama-class investment.

Buying a used Union horizontal boring mills: what to check

Measure spindle runout and quill play across full extension, the defining wear points on any used borer, and test spindle clamping at several positions. Verify table rotation accuracy with an indexing test, and inspect way surfaces, hand-scraped on older machines, for scoring or improper repair.

Separate original-control machines from retrofits in your evaluation: for retrofits, demand documentation of replaced components and post-retrofit geometry protocols; for originals, price in the retrofit you will eventually fund. Confirm facing head function and attachment inventories explicitly. Check foundation requirements and budget rigging professionally. Check column and ram alignment with a level and test indicator if you can inspect in person, since wear patterns on floor-type machines depend heavily on past workpiece mass.

On Exapro, used Union boring mill listings show series, spindle diameter, control, photos, and location. Compare available machines and submit an enquiry through the listing page on Exapro to request geometry documentation and inspection access.