# Custom Parts Manufacturing for Heavy & Construction Equipment

> Parts that carry load through mud, shock and a service interval nobody respects.

- HTML page: https://fabvector.com/industries/heavy-equipment (Portuguese: https://fabvector.com/pt/industries/heavy-equipment)

## Sourcing pain points we solve

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

- 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](https://fabvector.com/md/materials/alloy-steel-4140)
- [carbon-steel-1045](https://fabvector.com/md/materials/carbon-steel-1045)
- [steel-1018](https://fabvector.com/md/materials/steel-1018)
- [aluminum-6061](https://fabvector.com/md/materials/aluminum-6061)
- [phosphor-bronze-c510](https://fabvector.com/md/materials/phosphor-bronze-c510)

## Recommended finishes

- [black-oxide](https://fabvector.com/md/finishes/black-oxide)
- [zinc-plating](https://fabvector.com/md/finishes/zinc-plating)
- [powder-coating](https://fabvector.com/md/finishes/powder-coating)
- [chrome-plating](https://fabvector.com/md/finishes/chrome-plating)
- [as-machined](https://fabvector.com/md/finishes/as-machined)

## 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 — we do not claim to hold certifications on this page._

## Buyer questions, answered

### 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.