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Every question below came out of a real email — a buyer, a design engineer, a quality manager. Not one of them is here to fill a keyword.
51 answers across eight subjects. If yours is not here, send it — we will answer it and add it.
Safety-critical machined parts to customer drawings — marine engine fuel-system components, downhole tool bodies for rotary-steerable and MWD systems, aerospace structural parts, and deep-sea manipulator components. Mostly in specialty alloys: nickel superalloys, titanium, non-magnetic stainless and high-strength steels. More than 100,000 part types since 1993.
The plant-wide envelope reaches Ø1,000 × 10,000 mm across processes. Turning runs to Ø800 × 8,000 mm on our self-built FWT-80800; deep-hole work runs on a 12,000 mm machine envelope with 10,000 mm production-proven depth; five-axis to φ800 mm class.
Both, on the same floor, on the same route and the same inspection. Most of our work is repeat production for OEMs — which is why process discipline matters here more than one-off heroics.
Machining, deep-hole drilling, grinding, EDM, heat treatment, coating and plating, welding, and metrology. One quality system, one accountable team, one lead time — no handoffs to outside vendors where dimensions or structure can change.
Marine engines, oil and gas downhole tools, aerospace, and robotics. Each has a different failure mode — corrosion, fatigue, pressure or positional accuracy — and the process route changes with it.
Since 1993. ISO 9001 certified by TÜV Rheinland since 2002.
Yes. Our machine-tool subsidiary has designed and built a 6-metre five-face gantry machining center, a 12-metre-travel floor-type boring and milling machine, an 8-metre CNC lathe and a 7-axis gun drill. When a part demands a machine the market does not sell, we do not wait for the next catalogue.
Because when a part starts to fight the program, the people adjusting the process understand the machine’s stiffness envelope and thermal behaviour from the inside — they designed it. It also means the machine is maintained at the level of its design intent, not at the level of a service contract.
10,000 mm in production. The machine travel is 12,000 mm; the number we commit to, order after order, is 10,000 mm effective depth. We state both because they are different numbers, and a buyer deserves to know which one they are getting.
BTA drilling covers Ø20 to 360 mm. Small precision holes — Ø2 to 40 mm — run on our gun-drilling line, thirteen machines, all designed and built in-house.
It depends on diameter and depth-to-diameter ratio, not on preference. BTA is the route for large bores; gun drilling is the route for small, very deep holes. Send the drawing with depth and tolerance and we will tell you which one your part goes on, and why.
On production deep bores, entry-to-exit bore deviation holds within 0.3 mm per metre.
Yes — to 6,000 mm deep on 3-metre-stroke machines, drilled from both ends. That is how depth beyond a single stroke is reached without losing alignment.
Yes. Drilling and boring establish the hole; honing corrects size, roundness and surface roughness over the full length. Typical work: drill collars, hydraulic-control bodies, plunger barrels, hydraulic cylinders, valve sleeves.
Yes. Internal annular grooves, eccentric bores and multi-step seal bores are machined inside the deep hole in the same setup — a second clamping would cost the concentricity the seal depends on.
Simultaneous five-axis to φ800 mm class on imported Mazak VARIAXIS centres — i-800 at φ800/850 mm and C-600 at Φ630/650 mm. Long-axis parts to Φ400 × 6,000 mm are machined in one setup on our self-built FWV-M6080.
Simultaneous. Our machines run true five-axis simultaneous work, down to cross-holes at any angle. Tell us the part and we will tell you which strategy it needs.
±0.01 mm at the machining center. Where a surface also needs a fine finish, in-house grinding takes it to Ra 0.1 μm.
Tolerance depends on feature size, geometry and material — on large parts especially. Send the drawing: we will tell you, feature by feature, what we can hold.
Every re-clamping is a chance to lose a dimension. Five-axis removes the clamps: holes, pockets and contours on five sides stay in true position to each other, and the datum never moves between operations.
On metre-scale parts, thermal growth and structural rigidity dominate — a degree of spindle temperature is microns of drift metres away. Large-format five-axis and small-part five-axis are two different crafts; ours is the former.
Inconel 718, Incoloy 925, titanium TC4/TC11/TC18, non-magnetic stainless P550 and 15-15HS, 17-4 PH, high-strength steels and duplex stainless.
On a relative machining-difficulty scale (carbon steel = 1.00): nickel superalloys rate 9.26, titanium 4.17, high-nitrogen austenitic stainless 3.47. Those three are exactly what we run in daily batch production.
Yes — P550 and 15-15HS are routine. Non-magnetic grades are checked with magnetic hot-spot testing after machining and welding, because a single magnetized spot disqualifies the part downhole.
Yes — optical emission spectrometry on incoming stock, before the first cut. Material certificates travel with the job.
TC4, TC11 and TC18. Titanium puts heat into the cutting edge and springs back after the cut; both are answered with toolpath strategy and machine rigidity, not with speed.
Yes. Both sit in the high-strength stainless family we run routinely, and both are sensitive to heat input during welding — which is why welding and post-weld testing sit in the same plant as the machining.
Specialty suppliers we have worked with for decades. Material sourcing decides lead time on nickel-base and duplex work more often than machining does, and thirty years of relationships is why our dates hold.
Vacuum hardening, carburizing, nitriding and plasma nitriding, induction hardening, stress-relief annealing and QPQ; hard chrome, electroless nickel, copper plating, PTFE coating, anodizing and HVOF tungsten carbide; shot peening, laser cladding and several welding processes.
Yes — that is the point of in-house finishing. Coating allowance is engineered into the machining program, so your print dimensions are met after coating, verified by our own metrology before shipment.
It depends on the part and the service condition — different duty calls for different thicknesses. Send the drawing with its coating callout and we will confirm the range we hold for that process.
Yes — adhesion and porosity are checked by cross-cut, bend and thermal-shock tests.
SAE AMS 2430: 200% coverage, compressive layer depth greater than 600 μm, with multiple peening programs (high and low intensity, glass bead) by part requirement.
Every handoff is a quality black box and a week of lead time. When something goes wrong between three vendors, everyone blames someone else. One system, one accountable team, one lead time.
ISO 9001 by TÜV Rheinland since 2002 (certificate 01 100 019813, continuously maintained). Our common rail units are certified by seven classification societies: BV, ABS, CCS, DNV, NK, RINA and LR.
In-house metrology: CMM, roundness tester, roughness testers and a full gauge suite. A report travels with every order.
From material heat number to final inspection report. Machining, heat treatment and coating all happen under one roof, so the chain has no gaps.
On request, yes — dimensional report, material certificates, process records for heat treatment and coating, and the test certificates for any welding. Tell us what your quality function needs at the quoting stage and we build it into the route.
Programs we have executed include AMS 2750 (heat-treatment pyrometry), SAE AMS 2430 (shot peening), ASTM F1586 and NACE MR0175 (sour service). Tell us the specification on your drawing and we will confirm the execution route.
Within 24 hours an engineer reviews the drawing and replies with a feasibility assessment, process recommendations and potential manufacturing risks. We do not send instant prices — a quote is a price for a route, and the route has to be chosen first.
The drawing with depth-to-diameter ratio and tolerance callouts, the material, and the quantity. NDA welcome, yours or ours.
A single piece and a thousand-piece program run on the same floor. There is no minimum that forces you into a batch you do not need.
Quoted per part, because the route decides it. A part that needs vacuum hardening, coating and a final grind has a different clock from one that comes off the mill finished. We give the number with the quote, not after.
For spare parts and MRO work, yes — we make dimensionally compatible replacements to print or to sample. For new parts a drawing is faster and safer, because a sample does not tell us the tolerance the part was designed to.
Yes — most of our customers are outside China. We have supplied OEM engine programs in Europe and Japan for decades.
Yes — yours or ours. Finishing is the most outsourced link in this industry and every handoff is an IP exposure; our chain has none.
Where we have customer clearance, yes. Where we do not, we will describe the process and the tolerances instead — a supplier who shows you someone else’s drawing without permission is telling you something about how they will treat yours.
It does not ship. We inspect before dispatch and the report travels with the order. If a dimension is out, you hear it from us before the part arrives, not after.
You do, where the tooling is part-specific and paid for by you. Standard fixturing stays with us. Either way it is written into the order, not left to interpretation.
We machine for several companies in the same industries, and we do not discuss one customer’s parts with another. If exclusivity matters to your program, raise it at the quoting stage — it is a commercial conversation, not something to discover later.
Send the drawing. Within 24 hours an engineer replies with feasibility, process route and risks. If it fits, we quote; if it does not, we say so.
Send the drawing and the question together. An engineer replies within 24 hours — feasibility, process route, and the risks we can see.
Related: Capabilities Hub｜Materials Hub｜Equipment