BRASS TURNED PARTS
We turn brass. Since 1966.
GROHE Technology in Loßburg (northern Black Forest) produces brass turned parts in series: from CuZn39Pb3 (CW614N) and lead-free brass, in diameters from 6 to 65 mm, from 500 pieces, on INDEX multi- and single-spindle lathes and Star sliding-head lathes.
It all started with brass. In 1966 Johannes Thomas Grohe, son of Hans Grohe, founded an automatic turning shop to produce brass turned parts for the fittings industry. It has grown into one of the most modern companies in the northern Black Forest: 20,000 m² of production and office space, over 155,000 precision parts a day, certified to ISO 9001 and ISO 14001. Thanks to innovative technology and an optimised workflow, we deliver medium and large series as quickly as possible. By arrangement, we also produce small batches and samples.
Why brass?
CuZn39Pb3 (CW614N), often called Ms58, is the standard for precision turned parts. Its lead content of around 3% acts as a chip breaker and internal lubricant: short chips, low friction at the cutting edge, high cutting speeds and long tool life. For series production, that means short cycle times and high process reliability. Brass turned parts can also be electroplated without difficulty, for example chrome- or nickel-plated.
Lead-free when drinking water is involved.
For components in contact with drinking water, we turn lead-free and low-lead alloys such as CuZn21Si3P (Ecobrass). GROHE Technology is one of the pioneers in machining these alloys and invested more than ten years ago in its own swarf processing used exclusively for lead-free materials. More about lead-free brass
Workpiece facts
- Complete machining from bar stock
- Up to 42 tools, up to 3 of them in use at the same time
- Tightly toleranced fits, precise form and position
- Burr-free machining inside and out
- Turned visible surfaces from Ra 0.40, fine-turned from Ra 0.25
- Process-reliable on sealing surfaces from Rz 2
- Thin-walled geometries, complex internal machining
- Turn-milling and high-gloss turning
Applications
- Fittings and sanitary technology
- Electrical contacts and connectors
- Mechanical engineering
- Automotive industry
- Drinking water installations (lead-free)
Production facts
- Brass CuZn39Pb3 (CW614N)
- Lead-free: CuZn21Si3P (Ecobrass), CuZn41Mg (eZeebrass)
- Low-lead: CuZn40, CuZn42
- Turning in the range Ø 6–65 mm
- Quantities from 500 pieces, samples by arrangement
- INDEX multi-spindle lathes MS22, MS25, MS32C, MS40
- INDEX single-spindle lathes ABC, C100, C200, G200
- Star sliding-head lathes, Benzinger GoFuture (gloss turning)
- 100% inspection with optical-digital inspection system
- Single-grade swarf management
Frequently asked questions about brass turned parts
Series from 500 pieces. Small batches and samples by prior arrangement.
Ø 6 to 65 mm.
CuZn39Pb3 (CW614N), lead-free alloys such as CuZn21Si3P and CuZn41Mg, and low-lead alloys such as CuZn40 and CuZn42. Others on request.
Yes. GROHE Technology has been machining lead-free brass for more than ten years, with its own single-grade swarf processing.
In Loßburg-Betzweiler in the northern Black Forest (Baden-Württemberg, Germany). Delivery is just in time with our own vehicle fleet.
Yes. An optical-digital inspection system with four telecentric optics inspects every single part. GROHE Technology is certified to ISO 9001 and ISO 14001.