Lugs9 min read
Ring terminals, fork terminals, pin terminals and flag terminals
Four terminal families, four different connections. How the shape of the terminal decides access, retention and the risk of a loose joint.
Read
Sourcing notes for custom parts
Drawings, tooling, quality and landed cost, from the team that runs the programmes.
All guides, page 28
Browse the full library.
Busbars10 min read
Busbar current carrying capacity: how to size a bar without guessing
Current, temperature rise, ambient, mounting and duty cycle decide the bar. A table is a starting point, not an answer.
Read
Machining9 min read
Aluminium anodising: types and thickness
The difference between Type II and Type III anodising, how thickness is measured and what colour and sealing do to a part that has to fit, wear or conduct.
Read
Lugs9 min read
Cable lug inspection: dimensions, plating and barrel concentricity
What to measure on a lug, where each measurement sits on the part, and why barrel wall symmetry decides whether a crimp cracks or holds.
Read
Lugs9 min read
Connector current derating
How ambient temperature, altitude and adjacent loaded contacts reduce a connector's rating, and how to put the result on a drawing.
Read
Lugs9 min read
Copper braid construction: wire count, coverage and ampacity
Carriers, ends per carrier and wire diameter decide a braid's copper area, its flexibility and its current. Here is how to read the numbers and what to put on the drawing.
Read
Lugs8 min read
Long-barrel vs standard-barrel lugs
Barrel length changes crimp count, pull-out margin and the space the lug needs. A guide to choosing between the two without over-specifying.
Read
Lugs9 min read
Sourcing lugs and terminals from India: capability, standards and logistics
The category looks simple from a catalogue and less simple from a purchase order. How to check the process chain, the evidence and the route before a lug programme is placed.
Read
Lugs9 min read
Braided copper vs laminated copper: movement and current
Two flexible conductors solve the same problem in different ways. The choice comes down to how far the joint moves, how much current it carries and how the ends are terminated.
Read
Lugs9 min read
Cable lug pull test: sample size and acceptance
A pull test is only evidence when the sample, the setup and the acceptance rule are fixed before the first joint is made. A practical plan for proving a crimp.
Read
Lugs9 min read
Connector contact plating and fretting corrosion
Why a tin plated contact can fail in a dry, vibration-rich environment, and how gold, nickel and silver change the trade-off.
Read
Machining9 min read
Extruded aluminium enclosures: sealing, grounding and finishing
How the profile, the gasket groove, the end plate and the finish decide whether an extruded housing keeps water out and stays bonded.
Read
Go from reading to checking
The guides are built around the same questions as the free tools. Size a busbar, check an ISO 2768 callout, build a first article report or compare landed cost.
The Qumek dispatch
One useful email a month
Drawing notes, supplier checks, tariff changes and the questions buyers keep asking. No newsletter filler, no daily drip.