What This Part Is And Why It Is Made This Way
A fork bracket transfers load through two lugs into a pin, so the bores have to stay aligned and parallel under load. Misalignment concentrates stress on one lug and halves the effective strength of the joint.
These connectors are cast or forged in steel, then the pin bores are machined in one setup to hold alignment.
What You Get From This Route
Pin bores machined together so alignment is built in rather than corrected.
Forged option available where the joint is safety critical and needs grain flow.
NDT on the lug roots where load is concentrated.
Application Scenarios
- Excavator and loader linkage joints
- Crane boom connections
- Railway structural connections
- Hydraulic cylinder mounting brackets
Who It Is For
- Construction machinery manufacturers
- Lifting equipment builders
- Buyers replacing linkage parts on installed machines
Technical Features
- Cast or forged steel construction
- Pin bores machined in one setup
- NDT on load concentrated areas
- Weight range within 50 kg to 20 tonnes casting scope
What Buyers Run Into Without This Specification
- One lug carries the whole load because the bores are not parallel.
- A cast connector cracks at the lug root and a forged version is needed.
- Pin bore wear is not specified so replacement parts have inconsistent fit.
Published Material Weight And Process Data
Figures below are the published capability for steel castings and forgings. Part specific values — tolerance on individual features, finish, packing — are confirmed at drawing review and marked TBC until then.
| Material | 42CrMo4, G20Mn5, G26CrMo4, G18NiMoCr3-6, G22CrNi2Mo5-6, AISI 4340, AISI 4140, AISI 4325 and similar grades |
|---|---|
| Weight Range | Steel casting 50 kg - 20 T; forging 50 kg - 50 T |
| Process | Sand casting; shell moulding; open-die and closed-die forging; roll forging |
| Melting | High automation production lines with EAF + LF + VD / AOD melting routes |
| Tolerance | Zero draft sand casting to CT9 on automated heat treatment lines |
| Inspection | NDT with certified operators, single part certificates and quality document traceability |
| Part Specific Tolerance | TBC — confirmed against the customer drawing |
| Minimum Order Quantity | TBC — depends on the process route selected |
| Lead Time | TBC — confirmed with the production base at quotation |
How The Part Is Made And Checked
- Production — Highly automated production lines with EAF + LF + VD / AOD melting equipment.
- Quality — Certified NDT capability, supporting per-part certificates and traceable quality documents.
- Process Control — Automated heat treatment lines; zero draft sand casting reaches CT9.
Quality management is based on ISO 9001 and covers supplier management, raw material inspection, production process control and final inspection. Inspection results are archived and traceable.
Options And Alternatives
Parts are produced to the customer drawing rather than to a fixed catalogue item, so material grade, machining scope, surface treatment and packing are all specified per order. Machining, dimensional control, surface treatment and necessary pre-assembly can be added to the same supply route.
Where another process family would suit the part better — for example a forging in place of a casting for a shock loaded connector — that comparison is raised during drawing review rather than after tooling is committed.
How To Specify This Part
State the pin diameter, the fit class and whether a bush is fitted. If the joint is safety critical, ask for the forged route and specify the NDT level at the lug root — that is where fatigue cracks start, and it is inexpensive to inspect before shipment.
- Send the drawing with material, quantity, quality standard and target delivery date.
- State the inspection class and the zones it applies to, rather than a general note.
- Confirm the packing requirement and the lifting equipment available at the destination.
Related Guides
Other Parts In This Range
Large Steel Structural Castings
Load bearing steel castings up to 20 tonnes
View specifications
Slewing Support Structural Castings
Rotating support bodies with machined bearing seats
View specifications
Forged Shafts
Stepped shafts with continuous grain flow
View specifications
Flanges and Sleeve Components
Connection flanges and sleeve bodies
View specificationsFork Brackets and Connectors — Frequently Asked Questions
Should this part be cast or forged?
Forging forms a continuous metal flow line and gives higher strength, reliability and service life, so it is the usual choice for safety critical joints. Casting is proposed where the shape is complex and the load case allows it.
Can you inspect the lug roots by NDT?
Yes. UT, MT and PT capability is available and the inspection zones are agreed before production.
What do you need to prepare a quotation?
Drawings, material, quantity, quality standard and target delivery date.
Which inspection is included?
The inspection scope is agreed during drawing review. Automated heat treatment lines; zero draft sand casting reaches CT9.
Get A Quotation For Fork Brackets and Connectors
Send the drawing and the application. We will confirm the process route, the production base and the inspection scope before quoting.