Lugs9 min read
Crimp die selection and pull-out strength
The die and the barrel are one system. How to match them, set the crimp height and use pull tests to prove the joint rather than assume it.
Read
Sourcing notes for custom parts
Drawings, tooling, quality and landed cost, from the team that runs the programmes.
All guides, page 25
Browse the full library.
Lugs9 min read
Braid for earthing and grounding
An earth braid has to carry a fault current for a short time and then survive years of corrosion. Sizing, joints and testing all matter more than the weave.
Read
Lugs9 min read
Cable lugs for aluminium conductors: oxide, bimetallic joints and preparation
Aluminium is light and economical, but the oxide layer and the galvanic couple decide whether the joint lasts. A practical preparation and selection sequence.
Read
Lugs9 min read
Cable lugs for marine and offshore
Salt, vibration and class rules change the lug specification. A zone by zone guide to materials, plating and the records a surveyor will ask for.
Read
Quality9 min read
Certificate of conformity vs certificate of analysis
Two documents arrive with a shipment and both look official. One is a declaration and one is evidence, and the difference decides what you can prove later.
Read
Lugs9 min read
Crimp vs solder vs bolted terminations
Three ways to end a cable, with different tooling, different failure modes and different answers when the joint has to be repaired on site.
Read
Lugs9 min read
Flexible connectors and copper braids: what they do
A braid is a conductor built to move. Where it belongs, how its construction changes its behaviour, and what to inspect before it goes into a cabinet.
Read
Machining9 min read
Aluminium chromate conversion coating: corrosion protection and electrical contact
What a conversion coating does to an aluminium surface, where it helps a joint and where it has to be masked or replaced by a plating.
Read
Lugs9 min read
Cable lugs for EV charging and battery packs
High current, vibration and thermal cycling change the lug specification. What to decide before the joint is designed into a pack or a charging inlet.
Read
Lugs9 min read
Cable lugs for high-temperature applications
How copper, plating, insulation and crimp design set the real temperature limit of a lug, and where a nickel finish earns its cost.
Read
Lugs8 min read
Ferrule selection for flexible cables: class, sleeve and crimp profile
A ferrule keeps fine strands together, but only when the barrel, the sleeve and the crimp profile match the conductor. A six step selection method.
Read
Lugs9 min read
Flat braided connectors for switchgear
A flat braid is the part that lets a switchgear assembly move without loading a busbar joint. Pad geometry, stack height and installation decide whether it fits and how long it lasts.
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.