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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. Quote from your drawing.

Manufacturing Scope

Custom 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 and ±0.01 mm precision where the application requires it. 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 quickly.

14 families147 types⌀6–20 mm4 materials
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Part Families

Knurled KnobHand-turned knurled-grip control knob with internal thread.10 types⌀8–20 mmOpen the code & size table →Wing ScrewHand-tightened wing-head externally threaded clamping screw.10 types⌀12–20 mmOpen the code & size table →Knurled Thumb ScrewFlat knurled-head thumb screw tightened without tools.10 types⌀8–16 mmOpen the code & size table →Adjusting Lever HubStepped knurled-body adjusting-lever mounting hub with internal thread.10 types⌀14–20 mmOpen the code & size table →Detent PinKnurled pull-head hand-fitted detent/locating pin with cone tip.10 types⌀10–20 mmOpen the code & size table →Star Grip NutTall knurled-body hand-tightened internally threaded grip nut.10 types⌀10–20 mmOpen the code & size table →Hex Hand NutHex-body knurled-flange nut tightened by hand or wrench.10 types⌀12–20 mmOpen the code & size table →Plain FerruleStepped plain-body decorative ferrule with through bore.11 types⌀6–20 mmOpen the code & size table →Knurled RingKnurled-body decorative grip ring with through bore.11 types⌀6–20 mmOpen the code & size table →Tapered Transition HubDecorative hub with conical transition between two diameters, bored.11 types⌀9–20 mmOpen the code & size table →End CapDecorative end cap with blind bore and domed or conical tip for tube ends.11 types⌀6–20 mmOpen the code & size table →Threaded Decorative FinialScrew-on decorative finial with external threaded stud and ornamental head.11 types⌀8–20 mmOpen the code & size table →Hex Decorative FerruleHex-bodied decorative ferrule with wrench flats and through bore.11 types⌀8.1–19.6 mmOpen the code & size table →Stepped Decorative BezelMulti-step profiled decorative bezel with through bore.11 types⌀8–20 mmOpen the code & size table →

Frequently Asked Questions

Which materials are custom turned parts made from?

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.

What tolerances and precision do you work to?

We turn to ±0.01 mm precision on the Goodway SW-20 Swiss lathe. 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.

Do you make custom, non-catalog sizes?

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.

Is there a minimum order quantity?

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.

How does the quote and delivery process work?

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 quickly, based on the part and volume.

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