News

Some joint always has to be welded last, and finding it decides the whole order. This covers access, shrinkage, sub-assemblies, machining after welding, inspection points that disappear, and how to write a sequence that survives a shift change.

Slip, interference and weld gap are three intentions, not three grades of tightness. This article explains where each belongs, how heat closes or opens a gap along a joint, how to measure a fit, and what a consistently bad fit says about the drawing.

A compound angle is two planes at once, and no square will lay it out. Here is the wrap-around method for developing a tube surface, why two single cuts often beat one compound cut, and how to read the gap before the torch is lit.

A multi-bend tube can be made in more than one order and the orders do not give the same part. This covers middle-out and end-first sequences, straight length between bends, rotation control, springback and when a bend becomes a welded joint.

Pipe is sized by bore, tube by outside diameter, and that single difference decides which one fits. The article covers wall thickness and heat, tolerance in each product, pipe-to-tube transitions, and how to read a wall callout on a drawing.

Holes that line up in the fixture often fail on the vehicle. This article separates hole position, joint movement and tolerance stack-up, covers drilling to a jig versus drilling in place, and explains how welding sequence moves the holes it just made.

A shim looks like a scrap of stock and behaves like a load path decision. Here is what a shim can and cannot correct, why material and footprint matter, how to read a pattern of shims, and when the face should be re-machined instead.

A machined face and a formed face hold tolerance in different ways. This article covers what each gives you as a datum, how forming moves material, how to mix the two in one assembly, and what to do when the drawing marks no datum at all.