Can the same shop machine the mounting pads after welding?

Some can in house; others send the weldment to a partner gantry mill and quote it as one job. We tell you which before the RFQ goes out, so every quote already covers the machining.

What plate do mining frames usually use?

Structure is usually S355 or A572 Grade 50. Wear faces use abrasion-resistant plate in the 400 HB range, bolted on so that it can be replaced without cutting the frame.

How do you handle the weight and size?

By filtering shops on crane capacity in every bay and on oven and machine table size, and by flagging early when the piece will exceed a flat rack so you can decide on a split-and-bolt design.

Do you guarantee the weld quality?

No. The shop that quotes and builds is responsible for its welds, its NDT reports and its dimensional FAI. We check that the shop holds current procedures and certificates before it enters the network.

Is there a fee for buyers?

No. Buyers pay nothing. Shops pay a fee for each RFQ they choose to take, and we take no commission on the order.

Mining · Heavy fabrication sourcing

Mining equipment frames, fabricated to survive the load case.

Crusher and mill bases, screen decks, conveyor structures and the welded chassis under mobile plant. Send the drawing; we match it with up to three Vietnamese shops whose crane, oven and machining envelope fit the piece. They quote you directly.

Get Matched With a Heavy Frame Supplier What the drawing should say

01 · What we place

The mining work this network takes

Crusher and mill bases

Heavy plate weldments that carry a jaw, cone or ball mill and its drive. Stress relieved and machined flat on the mounting planes.

Screen and feeder support frames

Frames under vibrating screens and feeders, where fatigue detailing at every weld toe decides service life.

Conveyor structures and transfer towers

Stringers, idler frames, drive frames, gantries and transfer chutes, usually galvanised or painted to a named ISO 12944 category.

Mobile plant chassis

Welded chassis for track and wheel mounted crushers and screens, with machined bores for pivots and cylinders.

Wear-lined hoppers and chutes

Structural shells with bolt-on abrasion-resistant liners, designed so the liner is replaced and the shell is not.

Skids for process and dewatering packages

Pump, thickener and filter press skids with drip containment and lifting points rated for site rigging.

02 · Specification

What the drawing usually calls out

Typical call-outs for this class of work, credited to the standards that define them. They describe what buyers ask for, not a capability we hold ourselves. The shop that quotes confirms what it can actually meet.

Material	S355 or A572 Gr 50 for structure; abrasion-resistant plate around 400 HB for liners and wear faces, bolted not welded where it must be replaced
Weld standard	AWS D1.1 or AS/NZS 1554, with the loading condition stated as cyclic for anything under a vibrating machine
Fatigue detail	Weld toe profile and stiffener terminations per EN 1993-1-9 or AS 4100 detail categories, called out on the drawing
NDT	MT on fatigue-loaded fillet toes, UT on full-penetration butts in tension
Machined faces	Coplanarity across mounting pads, with a stated shim allowance; crusher bases typically 0.05 mm/m
Finish	Blast to Sa 2½ then ISO 12944 C4 or C5 system, or hot-dip galvanise to ISO 1461 for conveyor steel
Transport	Most crusher bases exceed a flat rack; split-and-bolt with machined mating faces is the usual answer

03 · Matching

How shops are shortlisted for mining work

Crane by bay, not by brochure

A 12 t crusher base has to be lifted at fit-up, into the oven, onto the mill and onto the truck. We check every bay before the RFQ goes out.

Oven length before price

Bases that are not stress relieved move after machining. We only send this work to shops with an oven that fits the piece, or that document vibratory relief where you allow it.

Fatigue-literate welders

Vibrating equipment fails at weld toes. Shops in this shortlist hold procedures for cyclically loaded work, not just static structure.

The full five-stage process is public on how we vet. Use it on your own suppliers if that is more useful than sending us the drawing.

FAQ

Questions mining buyers ask first

Can the same shop machine the mounting pads after welding?: Some can in house; others send the weldment to a partner gantry mill and quote it as one job. We tell you which before the RFQ goes out, so every quote already covers the machining.
What plate do mining frames usually use?: Structure is usually S355 or A572 Grade 50. Wear faces use abrasion-resistant plate in the 400 HB range, bolted on so that it can be replaced without cutting the frame.
How do you handle the weight and size?: By filtering shops on crane capacity in every bay and on oven and machine table size, and by flagging early when the piece will exceed a flat rack so you can decide on a split-and-bolt design.
Do you guarantee the weld quality?: No. The shop that quotes and builds is responsible for its welds, its NDT reports and its dimensional FAI. We check that the shop holds current procedures and certificates before it enters the network.
Is there a fee for buyers?: No. Buyers pay nothing. Shops pay a fee for each RFQ they choose to take, and we take no commission on the order.

Guides

Read before you send the RFQ

Not sure this is the right category for your part? Email the drawing to and we will say plainly where it fits.

Have a mining drawing ready?

Send it with the destination port. Within 24 business hours we tell you which shops clear the envelope, and up to three of them quote you directly.

Get Matched With a Heavy Frame Supplier

We reply within 24 business hours.