Industry
Heavy & Construction Equipment
Parts that carry load through mud, shock and a service interval nobody respects.
FabVector machines Heavy & Construction Equipment parts in Alloy Steel 4140, Carbon Steel 1045, Low-Carbon Steel 1018, from 1 piece, with instant online estimates, engineer-reviewed quotes in 24 hours and NDA-protected files. Delivery with duties handled to the US, Canada, UK and Australia.
- Materials
- Alloy Steel 4140, Carbon Steel 1045, Low-Carbon Steel 1018
- Minimum order
- 1 piece
- Estimate
- ~60s online
- Quote
- engineer-reviewed 24h
- IP
- NDA from upload
What slows this industry down
Heavy machinery parts fail at the interfaces, not in the middle. A pivot pin that is two hundredths oversize seizes in the bushing after the first wet season; one that is undersize hammers the bore oval within a thousand hours. That makes the fit class, the surface finish in the bearing area and the hardness after treatment the whole job — the outside profile is almost decoration. Aftermarket and retrofit orders arrive without drawings, as a worn sample and a request to "make it like this but better", which needs someone willing to measure and produce a print before quoting. And the parts are heavy and awkward: a 40 kg housing costs more to ship wrong than it did to cut, so first-article approval before batch release is not bureaucracy, it is freight insurance.
Typical parts we machine
- Hydraulic cylinder end caps and gland nuts
- Pivot pins, bushings and thrust washers
- Gearbox and final-drive housings
- Boom, arm and linkage brackets
- Valve blocks and port manifolds
Recommended materials
Alloy Steel 4140
Chromoly muscle: deep-hardening alloy steel for heavily loaded shafts, tooling and gears.
Carbon Steel 1045
The shaft steel: strong, cheap, induction-hardenable exactly where it counts.
Low-Carbon Steel 1018
The friendly mild steel: welds beautifully, case-hardens to a glassy skin, costs less than anything.
Aluminum 6061-T6
The default CNC aluminum: strong enough for most jobs, machines fast, anodizes well.
Phosphor Bronze C510
The spring bronze: fatigue resistance and low-friction wear for contacts and bushings.
Recommended finishes
Black Oxide
Black with zero dimensional change: the gauge-and-tool finish for precision steel.
Zinc Plating
The economy rust-stopper: sacrificial zinc keeps protecting even when scratched.
Powder Coating
Baked-on polymer armor: any RAL color, outdoor-proof, the toughest cosmetic coating.
Hard Chrome Plating
The hardest plated surface in the shop: ~65 HRC chrome for sliding and abrasive service.
As-Machined
The baseline finish: straight off the machine, fastest and cheapest.
Certifications & standards
- ISO 9001
- We understand equipment OEMs expect ISO 9001-grade control on fit-critical features, with the bearing diameters and bore fits recorded rather than spot-checked.
- EN 10204 3.1
- We support EN 10204 3.1 certificates on 4140 and 1045 load-path parts, where the delivered mechanical properties are what the structural calculation assumed.
- ISO 2768-m / ISO 286
- General tolerances plus an explicit fit class on pins and bores; we quote against the fit, not the nominal diameter, because that is the dimension that decides service life.
We understand and support these requirements; certification and documentation scope is confirmed per order.
Questions heavy & construction equipment buyers ask
- Can FabVector supply forged and machined heavy-equipment parts under one order?
- Yes, by engineering-reviewed RFQ. FabVector can coordinate the forged blank, heat treatment, CNC finish machining, coating and dimensional inspection for pins, links, yokes, shafts and other load-path parts. Send finished CAD, material, annual volume and load direction so forging route, tooling, grain flow and machining allowance are reviewed together.
- What fit class should pivot pins and bushings be machined to?
- Specify the fit, not just diameters — typically H8/f7 running fits for greased pivots, tighter where side load fights slop. A pin two hundredths oversize seizes after the first wet season; undersize hammers the bore oval within a thousand hours. We inspect pins and bores as mating pairs when both are on the order.
- Can a worn part be reverse-engineered without a drawing?
- Yes — aftermarket and retrofit work often arrives as a worn sample and "make it like this but better". We measure, reconstruct nominal dimensions accounting for wear, produce a print for your approval, then machine to it. The print approval step is not optional: it is where "better" gets defined in numbers.
- Why insist on first-article approval before releasing a batch of heavy parts?
- Because a 40 kg housing costs more to ship back wrong than it cost to machine. FAI before batch release converts freight risk into one part's worth of schedule — on international heavy work that trade is arithmetic, not caution.
Relevant services
CNC Turning
Live-tooling lathes for shafts, pins, bushings and threaded fittings up to Ø406 mm.
CNC Milling
3- and 4-axis vertical machining for housings, brackets, manifolds and structural parts.
Production Machining
Dedicated fixturing, in-process CMM and SPC documentation for repeatable volume runs.
Surface Grinding
Abrasive finishing for flatness, parallelism and tight thickness control on hardened parts.
Custom Forging
Forged blanks and finished load-bearing parts, with tooling, machining, heat treatment and inspection coordinated as one program.
CNC machining service by country
Have a part in mind?
Upload CAD or drawings. Eligible CNC work gets an instant estimate; other processes move to engineer review. NDA-protected from the first byte.
Start an RFQ