Rotating parts: impellers, casings, rotors and shafts
Impellers, casings, rotors, shaft systems and fan components, machined in Tallinn from 10 kg to 5,000 kg and Ø 500 to Ø 4,000 mm. Rotating parts are dynamically balanced up to Ø 4,000 mm and 4,000 kg in carbon steel, stainless, duplex, super duplex and titanium, inspected by VT, PT, MT and RT.
First In Service machines rotating parts and shafts up to Ø 2,700 mm diameter, 13,000 mm length and 4,500 mm height, holding tolerances to ±0.02 mm in stainless steel, duplex, super duplex, Inconel, Hastelloy and titanium. Vertical turning reaches Ø 2,700 mm on the SC27 lathe; boring reaches X 13,500 mm on the FERMAT WRF 130. Welded structures up to 35 × 7 × 7 metres and 160 tonnes are fabricated in the same facility, so welded-and-machined assemblies never cross a company boundary mid-process.
Rotating parts we machine.
The list is not exhaustive. If the part is round, heavy and tightly toleranced, send the drawing.
On rotating parts, the tolerance is the product.
Rotating equipment fails expensively. A pump casing machined a hundredth out of true, a shaft whose residual stress is released after the final pass, an impeller in the wrong alloy for the service fluid: each can cause an unplanned outage costing days of lost production, far more than the price of the part. What a buyer of rotating parts is really paying for is dimensional certainty, verified material and a supplier who understands why the tolerance is written where it is.
Shafts up to 13 metres long.
Shafts up to 13,000 mm long are machined on the FERMAT WRF 130 floor-type boring mill, which has 13,500 mm of X travel. Shafts up to 3,250 mm long and Ø 1,000 mm are turned on the PUMA 700LY II horizontal turning centre, where live tooling adds milled features in the same setup. Hubs, flanges and rings up to Ø 2,700 mm are turned on the SC27 vertical lathe.
A 12-metre shaft or a 40-tonne housing gets a setup plan before it gets a spindle: how it is supported so its own weight does not distort the datum, in what order features are cut so residual stresses release early rather than after the final pass, and where in the sequence dimensional checks catch drift while there is still material to correct it.
Dynamic balancing up to Ø 4,000 mm and 4,000 kg.
Impellers, rotors and fan components up to Ø 4,000 mm and 4,000 kg are dynamically balanced as part of the same order, so one supplier is responsible for both machining and balancing. State the balance grade your drawing or specification requires when you send the enquiry.
Large rotating components, machined and documented in one place.
We machine impellers, pump and compressor casings, rotor and shaft systems and turbine housings up to Ø 2,700 mm and 13,000 mm in length, holding ±0.02 mm where the fit demands it. Fabrication, machining, surface treatment and assembly happen in one 18,000 m² Tallinn facility, so a welded-and-machined assembly never crosses a company boundary mid-process.
Typical scope
Relevant equipment
Materials
What this work runs on.
Specifications at a glance
| Rotating parts | Impellers, rotors, fan and blower components |
|---|---|
| Shafts | Up to 13,000 mm long; turned up to Ø 1,000 × 3,250 mm |
| Casings and housings | Pump, compressor, turbine and bearing housings |
| Component weight | 10 kg to 5,000 kg |
| Balancing | Dynamic, up to Ø 4,000 mm and 4,000 kg |
| FERMAT WRF 130 | Floor-type boring mill, X 13,500 mm — shaft lines and housings |
| SC27 VTL | Vertical turning to Ø 2,700 mm — rings, flanges, hubs |
| PUMA 700LY II | Horizontal turning, live tooling, L 3,250 mm |
| ZAYER XIOS 4000 | Bed-type CNC milling, X 4,000 mm |
| Corrosion-resistant | Duplex, super duplex, stainless |
| Speciality alloys | Inconel, Hastelloy, titanium |
| Traceability | EN 10204 3.1 standard, 3.2 on request |
Questions buyers of rotating parts ask
Can First In Service machine large impellers and pump casings?
Rotating components up to Ø 2,700 mm and 13,000 mm in length are machined to tolerances down to ±0.02 mm, in stainless steel, duplex, super duplex, Inconel and titanium.
What size shafts can you machine?
Shafts up to 13,000 mm in length on the FERMAT WRF 130 floor-type boring mill (X travel 13,500 mm), and up to 3,250 mm with live tooling on the PUMA 700LY II horizontal turning centre.
Do you manufacture components for hydropower and turbines?
Turbine housings, rotor and shaft systems and casings are within our 160-tonne, 35-metre envelope, with full material traceability.
What documentation ships with rotating parts?
Dimensional inspection reports, EN 10204 3.1 material certificates (3.2 on request), and NDT reports (VT, PT, MT, UT) performed by certified partners.
Do you balance rotating parts?
Yes. Rotating parts up to Ø 4,000 mm and 4,000 kg are dynamically balanced. State the balance grade your drawing or specification requires when you send the enquiry.
A drawing is all we need for a machining answer.
Send your drawings and specifications. An engineer replies within 1 working day and a firm quote follows within 5 working days.
Request a quoteBook a 20-minute call →Download capability overview (PDF)