Custom Turned Parts (Sonderdrehteile) Manufacturing
Custom turned parts on the Goodway SW-20 Swiss lathe: knurled knobs, wing screws, hand nuts and 147 types. ⌀6–20 mm; steel, stainless, brass, aluminum.
Part Families
Knurled Knob
Hand-turned knurled-grip control knob with internal thread.
⌀8–20 · L 10–27 mm
10 types
Wing Screw
Hand-tightened wing-head externally threaded clamping screw.
⌀12–20 · L 15–44 mm
10 types
Knurled Thumb Screw
Flat knurled-head thumb screw tightened without tools.
⌀8–16 · L 12–38 mm
10 types
Adjusting Lever Hub
Stepped knurled-body adjusting-lever mounting hub with internal thread.
⌀14–20 · L 14–28 mm
10 types
Detent Pin
Knurled pull-head hand-fitted detent/locating pin with cone tip.
⌀10–20 · L 19–46 mm
10 types
Star Grip Nut
Tall knurled-body hand-tightened internally threaded grip nut.
⌀10–20 · L 8–16 mm
10 types
Hex Hand Nut
Hex-body knurled-flange nut tightened by hand or wrench.
⌀12–20 · L 9–18 mm
10 types
Plain Ferrule
Stepped plain-body decorative ferrule with through bore.
⌀6–20 · L 8–32 mm
11 types
Knurled Ring
Knurled-body decorative grip ring with through bore.
⌀6–20 · L 10–26 mm
11 types
Tapered Transition Hub
Decorative hub with conical transition between two diameters, bored.
⌀9–20 · L 16–30 mm
11 types
End Cap
Decorative end cap with blind bore and domed or conical tip for tube ends.
⌀6–20 · L 8–18 mm
11 types
Threaded Decorative Finial
Screw-on decorative finial with external threaded stud and ornamental head.
⌀8–20 · L 12–26 mm
11 types
Hex Decorative Ferrule
Hex-bodied decorative ferrule with wrench flats and through bore.
⌀8.1–19.6 · L 8–20 mm
11 types
Stepped Decorative Bezel
Multi-step profiled decorative bezel with through bore.
⌀8–20 · L 12–20 mm
11 types
Enter ⌀ and L to list matching variants with code and tolerance.
Search this category by sizeCustom turned parts is the umbrella term for turned components that fall outside standard machine-part ranges — typically pieces that are handled, gripped, or sit on a visible surface. This category holds 14 families and a total of 147 types: knurled knobs, wing screws, knurled thumb screws, adjusting lever hubs, detent pins, star grip nuts, hex hand nuts, plain ferrules, knurled rings, tapered transition hubs, end caps, threaded decorative finials, hex decorative ferrules and stepped decorative bezels. These parts are used across machine building, furniture and fixturing, medical devices, electrical-electronic and automation assembly lines. We machine them in steel, stainless steel, brass and aluminum, working to fit classes such as h6/H7 where the application requires it; ±0.01 mm is targeted on critical diameters. Production runs on the Goodway SW-20 Swiss-type lathe within a ⌀6–20 mm range (the SW-20 ceiling is ⌀20 mm). Beyond the 147 catalog types, we manufacture to your own dimensions from a technical drawing. Pricing is by quote: send a drawing or sample, material and quantity and we return a quote.
These are short, stout parts: 8–46 mm long, with no variant exceeding L/D 2.7. Rigidity is not the constraint here, repeatability is — 147 variants, machined in one setup, requiring 31× thread turning, 21× hex flat milling, 106× axial bore, 20× taper turning, 93× knurling.
Everything here is held to 7 tolerance classes (6H, 6g, h10, h11, h7, h8, h9), and 83% of the variants map to a DIN or ISO standard.
Every part is CNC-turned to your drawing — series, small batches and custom turned parts. Send your drawing (PDF/DWG/STEP) for a quote.
Frequently Asked Questions
Steel, stainless steel, brass and aluminum are our core materials. Visible parts like knurled knobs and decorative finials are usually stainless or brass; load-carrying hubs and pins are typically steel. We help you choose based on the application and the surface finish you expect.
We turn on the Goodway SW-20 Swiss lathe; ±0.01 mm is targeted on critical diameters. On diameters that require fits we apply tolerance classes such as h6/H7, and we cut threads and knurls exactly to your technical drawing. A measurement report can be requested for critical dimensions.
Yes. The 14 families and 147 types are a standard reference; our core work is custom manufacturing from your drawing. Within the ⌀6–20 mm range (SW-20 ceiling ⌀20 mm), we produce the part exactly to the dimensions, threads and knurl type you supply.
We handle everything from a single prototype/sample up to series production. Exact price and delivery are settled at the quote stage based on part complexity and total quantity; we do not impose a fixed binding minimum.
We have manufactured in Düzce since 2009 and serve both the domestic market and export. Just send a technical drawing or sample, the material and the quantity; we share the quote and a firm lead time in writing, based on the part and volume.
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