CNC Machining in Türkiye: Turning, Milling and Boring to Drawing
Shafts, bushings, flanges, housings, plates and welded frames machined to your drawing, from one prototype to repeat series. For very heavy parts up to Ø4,200 mm and 12 tonnes, see our large-part machining.
- Own CNC machinesSmall and medium parts
- Turning · millingShafts, flanges, housings
- After weldingFaces, bores, hole patterns
- Fanuc · SiemensCNC controls
- ISO 9001Certified quality
Turning, Milling and Boring to Your Drawing
We machine parts from bar, forgings, plate and weldments: drive shafts and rollers, flanges and rings, gear and bearing housings, machine beds and bases. Production data can be a PDF drawing, a STEP model or a DXF. Tolerances follow the drawing, with ISO 286 fits and ISO 2768 general tolerances where specified.
Most of our work is welded first and machined second. Because welding and machining are planned together, machining stock is left at fit-up and datum faces are agreed before cutting starts. The result is a frame or housing that arrives with its mounting faces, bores and bolt circles already in tolerance.
Machining at a glance
- CNC turningØ610 × 1,400 mm
- CNC millingup to 1,800 × 800 × 800 mm
- ControlsFanuc · Siemens
- MeasuringCMM measurement
- Larger partsUp to Ø4,200 mm in Kemalpaşa
Machining Envelope
CNC turning to Ø610 × 1,400 mm and milling to 1,800 × 800 × 800 mm cover small and medium parts. The larger machines below are at the Kemalpaşa plant. If your part sits near a limit, send the drawing and we confirm the machine.
Which machine for which part
| Part type | Machines | Maximum capability |
|---|---|---|
| Frames, bases, housings | Doosan DBC 130L II / CX, Scharmann FWH, WFL BF125 | X 4,500 × Y 2,500 × Z 2,000 mm |
| Flanges, rings, drums | Dalian YiMei CKQ5240 and CK 123, Schiess CU 1250 | Ø4,200 × 2,500 mm |
| Long shafts and rollers | Manual lathe, ZMM Sliven CU 1250, TOS SN71B, SMTCL | Ø2,400 × 6,000 mm |
| Precision rotational parts | CNC lathe | Ø610 × 1,400 mm |
| Medium parts, covers, plates | Taksan TMC 1160, 1270, 1680, 1890 | 1,800 × 800 × 800 mm |
What We Machine
Housings and Blocks
Gear, bearing and valve housings, milled and bored on all faces in one or two set-ups.
Flanges and Rings
Large flanges, slewing rings and bearing seats turned on vertical lathes up to Ø4,200 mm.
Shafts, Rollers and Rods
Drive shafts, conveyor rollers and piston rods with bearing seats, keyways and threads.
Steel rollers →Machine Frames and Beds
Welded frames milled on datum faces and bored for gearboxes, motors and linear guides.
Base Plates
Thick plates and welded bases with machined faces, bores and tapped hole patterns.
Precision Parts in Series
Bushings, pins, covers and fixtures in repeat batches on CNC lathes and machining centres.
Machining After Welding, Step by Step
Plan the datums
Datum faces and machining stock are agreed during the drawing review, before any plate is cut.
Weld with stock
The part is welded with extra material on faces and bores that will be machined.
Stress and check
Large weldments are checked for distortion before they go on the machine.
Machine
Faces, bores, bolt circles and threads are machined in as few set-ups as possible.
Measure
Critical dimensions are measured, by CMM where the tolerance needs it.
Protect and pack
Machined faces are protected, then the part is coated, crated and shipped.
CNC Machining in Practice
Large parts: our family group’s plant in Kemalpaşa
Parts too large for our own CNC machines are machined at our family group’s heavy-machining plant in Kemalpaşa, İzmir: 1,600 m², vertical turning to Ø4,200 mm, 4,500 mm boring travel and 12 t cranes. Nika Steelworks quotes the order, manages it, inspects the parts and stays your single contact. Large-part machining →
Questions About CNC Machining
What is the largest part you can machine?
On our own CNC machines we turn and mill small and medium parts. At the Kemalpaşa plant, vertical turning reaches Ø4,200 mm and 2,500 mm height. Boring and milling travel reaches 4,500 × 2,500 × 2,000 mm, and long-bed turning reaches 6,000 mm length at up to Ø2,400 mm.
Can you machine a part after welding?
Yes, and it is most of our work. Machining stock is planned at fit-up, so faces, bores and bolt circles hold the drawing tolerance after the weld has cooled.
Which tolerances can you hold?
Tolerances follow the drawing, including ISO 286 fits for bearing seats and bores. Tell us the critical dimensions and we confirm the machine and the measuring method.
Which materials do you machine?
Carbon and alloy steels, stainless steel, cast iron, bronze and aluminium.
Do you machine serial parts?
Yes. CNC lathes and machining centres run repeat batches on proven programs and fixtures.
Which files can I send?
PDF drawings, STEP or IGES models and DXF files. A 2D drawing with tolerances is needed for the quotation.
Precision and Large-Part CNC Machining in Türkiye
Most of what we machine is small or medium: bushings, shafts, flanges, housings and the faces and bores of welded parts. A three-metre flange, a welded machine bed or a heavy gear housing is machined in Kemalpaşa under the same Nika Steelworks order.
Heavy parts and precision parts
CNC lathes and Taksan machining centres with Fanuc and Siemens controls handle medium and small parts: bushings, covers, plates, fixtures and repeat components. One supplier can deliver both the heavy housing and the small parts that bolt to it.
Welded and machined from one supplier
Because the same team plans both steps, the datum used for welding is the datum used for machining. See welding and fabrication and our precision machined fabrications.
Inspection and delivery
Critical dimensions are measured before packing, by CMM where the tolerance band needs it. Every order ships with EN 10204 3.1 certificates. Parts are painted or galvanized as specified, then crated for road or container transport to Europe.
Designing a welded part that will be machined? Read how to dimension a weldment.
Check the machine park or send your drawing.
Send a drawing for machining.
Include material, quantity, critical tolerances and coating. We reply with feasibility, lead time and price in English, German or Turkish.