Posted by Dr_GMJN on 03/02/2021 08:55:36:
Posted by Ron Laden on 03/02/2021 06:58:37:
I don't even buy Loctite by brand name now I buy the cheaper versions at less than half the price….
I know what you mean, and I understand Duncan's comment about not all Chinese stuff being bad, but for me, the difference in cost between Loctite and others isn't worth the risk. For the amount I use I'd rather avoid the "just buy the right stuff and this wouldn't have happened" type comments! …
Just my opinion!
…
I apply a bit of engineering logic to the problem: how good does the glue need to be for the purpose I have in mind? For me, the answer is usually 'not very' in which case I don't waste money on excessively good products.
By far the biggest problem with superglue in my workshop is old product. I mostly use a few drops at a time, maybe once a fortnight, and super-glue goes off, small quantities rather quickly. Joints made with old glue are weaker, then the glues gums up completely. In my workshop cheap unopened Poundshop capsules are better value than a small bottle of expensively but slowly used Loctite. Bigger containers last longer, but if strength matters don't use old glue even if it has a reliable brand-name and cost la small fortune.
Once in a blue moon I make something that does need a reliable joint, or I need a lot of glue in one session, and for that I cough up.
Hobby engineering doesn't have the same high standards as safety-critical 'real' engineering. We don't do engineering calculations or properly understand everything we do. We often extemporise, for example by using scrap, other sub-optimal materials, bodged work-holding, or adapted tooling. We reduce thread engagements, braze with underpowered torches, weld with primitive equipment, bodge 3-phase, believe ancient tools are wonderful, learn on the job, and rely on processes industry has long since replaced. Most of us enjoy buying 'bargains'. In that context, rushing to buy certificated materials, calibrated tools, and insisting on traceability is likely to be a waste of money, especially if these things are misused in an amateur workshop.
Glue is an example; not only is it essential to buy reputable product that's been stored correctly, it's also necessary to clean joints thoroughly. Cleaning is quite difficult to do properly. Most of my early glue failures were due to dirt and not following the instructions rather than relying on cheap unbranded product. If you want 'quality' everything has to be done right, it's not done by just flinging money about.
Dave