Fritz Leng Hartmetall Ziehwerkzeuge has manufactured drawing tools since 1948: tungsten carbide wire drawing dies, drawing dies for bars and tubes, carbide mandrels, shaving and scalping dies, compacting dies, sheathing nozzles and custom carbide tooling, all made to order in Herborn-Schönbach, Germany. Bore diameters range from 0.2 to 150 mm. We also recondition worn dies and stock polishing and inspection accessories.
Which drawing tools does Leng manufacture?
We manufacture and supply drawing tools made of steel, tungsten carbide and ceramic for the wire, tube and bar industry, plus custom tooling in hard materials made to customer drawings. Every tool is made to order: designed for your material, ground in-house, hand-polished. Measuring reports are supplied on request.
Tungsten carbide wire drawing dies
Wire drawing dies (German: Ziehsteine) reduce wire and other strand-shaped material to the target diameter. We design entrance, drawing angle and bearing length with our own calculation software, matched to your material and reduction. Available in various carbide grades, with hard-material coatings, or as ceramic dies.
Carbide drawing dies for bars and tubes
For bar and tube production we manufacture drawing dies in all common nib and casing dimensions, with casing diameters up to 450 mm. Drawing schedules and die geometry are calculated with our own software.
Drawing dies for bars and tubes in detail
Carbide mandrels
We manufacture fixed mandrels (plugs) for chain-type draw benches, covering tube diameters from 2.5 to 200 mm, and floating mandrels for continuous drawing on drum-type draw benches. Mandrel geometry is calculated with dedicated software; coatings are available.
Shaving and scalping dies
Shaving and scalping dies remove scale and drawing defects from rolled and cast wire by machining with a geometrically defined cutting edge. Most are made to customer drawings; coatings extend tool life.
Shaving and scalping dies in detail
Custom carbide tooling
We manufacture custom tooling to your drawing: as a carbide blank or ready-to-install finished part, also in hardened steel or ceramic, to tight tolerances.
Custom carbide tooling in detail
Sheathing nozzles, wire and cable guides
For the cable industry we supply sheathing nozzles as well as wire and cable guides in tungsten carbide or various ceramic grades, polished or unpolished, made to customer drawings.
Compacting dies
Compacting dies compact stranded cables and wire ropes. Available with TiC, TiN, DLC or diamond coating, and also in a split design.
Die reconditioning
Regrinding worn carbide drawing dies is one of our particular strengths. We regrind and repolish to the next available size, so you get a like-new tool at considerably lower cost than a new one.
Which accessories does Leng stock?
For die polishing and inspection we stock diamond suspensions in grit sizes from 3 to 45 µm (oil- and water-based), electroplated diamond grinding pins and pin gauge sets, plus diamond powder, diamond paste, polishing sticks and polishing felts. These are the same products we use daily in our own polishing shop. Ordering runs through our German-language shop; English inquiries are welcome.
Made to order or from stock: how do you order from Leng?
Drawing tools are application-specific: material, dimensions, reduction and geometry determine the design. We therefore manufacture every tool on request or to your drawing. You send us your requirements, we design the tool and prepare a quotation. A large stock of blanks keeps delivery times short, within 24 hours if necessary. Accessories are stocked items; see the accessories page for how to order.
