Talk:Washer (hardware)

message: It looks to me like notes a and b (re: failing lock washers & BMW) are both referencing the exact same publication (and pages, and comments thereon), with different wording and the titles shuffled around. Aside from a little more detail on applications, a little more tortured grammar, and a [citation needed] sticker, the second seems to be functionally identical to the first. Or am I missing something?
: —73.17.158.98 (talk) 20:40, 29 August 2016 (UTC)
thread_title:  Duplicate notes? 

message: It would be useful to have an explanation of which circumstances, for instance, a washer is not needed.
I'd suggest adding pictures of washers in use.  Incredibly, this page does not have even one such picture.  Hardware dufuses such as myself want to know which side of the connection the washer goes on (without having to guess). - 24.17.218.38 (talk) 20:21, 30 October 2010 (UTC)
thread_title:  More detailed description needed 

message: :Is anyone up for seeking out some engineering research on the effectiveness of lock washers? The opinion of the one author referenced [see Sf5xeplus's comments above] doesn't seem to carry as much weight as an industry  that consistently uses locking washers (spring or otherwise). Looking at the two refs Sf5xeplus quotes, the argument presented against locking washers is more an appeal to common sense (and perhaps the authors experiences, though he doesn't actually claim that) rather than engineering principles backed up by tests and experiments.. Drevicko (talk) 03:49, 28 September 2011 (UTC)
replies: text:  I don't have much worth adding here right now, engineering-wise, but I just wanted to mention that aircraft engineers must have found lock washer performance unsatisfactory in some cases over the years, because in some fastener applications they go to such expense with bothering to cross-drill the bolt heads and wire them (against rotation) with stainless steel wire. I think the question may be, *how much* vibration is expected in the particular application, and how safety-critical is that application? I bet lock washers are plenty good enough for many applications, and they spare the expense of doing anything more elaborate in those cases. So they have a little of both sides—adding real value in some applications, and showing inadequate performance in other apps. Forgive me if this entirely non-evidence-based comment doesn't really add anything that wasn't already said. I just had this thought off the top of my head and shared it FWIW. — ¾-10 23:52, 30 September 2011 (UTC)
replies: text: One reason that they MAY be out of favor is that in aircraft, the materials being clamped are usually aluminum. Hard steel (or hard whatever) will eventually cause the aluminum to creep (or displace) because of the force, and once displaced the locking force is relaxed and therefore nil. Dreviko's request for experimental data on this is likely non-existing because no one at least in my industry will argue with this... And we engineers rarely have budgets prove the obvious. We typically do not use them in the electronics industry for mounting printed circuit/wiring boards for that reason. Ken (talk) 21:13, 19 November 2014 (UTC)
thread_title: Reprise of this topic

message: Removal , See below:
 This maintains tension and opposes any loosening influence on the fastener. The flexed teeth absorb shock, vibration and slipping.
Internal tooth washers have the teeth pointing inward. They are used when the finished appearance requires that the teeth be hidden under the head of the screw, or to avoid the teeth scratching or snagging. Also used with screws with smaller heads. External tooth washers have teeth pointing radially outward. They are used when finished appearance is less crucial as it provides the greatest torsional resistance and therefore locking efficiency because the teeth are on the largest radius. Combination tooth washers have teeth on both sides. They are used when a larger bearing surface is required. It is also often used when there is an over-sized hole. Countersunk external tooth washers are used with Flat Countersunk or Oval Countersunk Screws with angles of 82 or 100 degrees.
These are too close to, or are copied from the references. Can't use as is.Sf5xeplus (talk) 16:38, 13 October 2010 (UTC)
replies: text: Thanks for the heads up. I reworded it to fix the copyvio problem. Wizard191 (talk) 16:41, 19 October 2010 (UTC)
thread_title: Toothed washers

message: Square washers up to 70mm or so, are often used in masonry work. 
Tapered washers are commonly used in conjunction with structural steel beams, to match the taper of the flanges of the beams.  — Preceding unsigned comment added by Suma rongi (talk • contribs) 07:05, 27 April 2011 (UTC)
thread_title: Other types

message: I was redirected to this article from Rondelle.  There's no mention of Rondelle here. Opbeith (talk) 14:58, 25 September 2012 (UTC)
replies: text: It's the French term for washer, apparently. Is there another definition that you're aware of?Kortoso (talk) 19:44, 5 June 2015 (UTC)
thread_title:  Rondelle 

message: These are NOT the same thing!!
A serrated washer has serrations on the face of the washer.  A star washer has prongs which project radially (or, sometimes, point inward radially).drh (talk) 18:16, 22 July 2015 (UTC)
replies: text: Sometimes both are true simultaneously (radial teeth that are twisted up at the tip). But yeah, I'm sure you're right that the coverage could be expanded or improved. — ¾-10 01:30, 23 July 2015 (UTC)
thread_title:  Serrated washer and  "star" washer 

message: I just learned of a product called "Nord-Lock" (which Fastenal (a distributor of fasteners) also calls "Delta Protekt", though they also use that term for another product with apparently less thoroughly engineered features of similar concept). My brother sent me a link to a YouTube promo video that I found entirely compelling. I assume they have the same information in a more appropriate reference form on their own site, but I haven't spent any time to find it. The tests shown seem to me to be rigorous and the results possibly encyclopedic?? At the very least I would say that the product or product category should be added to this page, as there is currently nothing even close listed here. I wish I had the time (and, even better, experience doing so) to research and write it up myself, but I simply do not so I'm putting this out there in hopes that someone else can.  — Preceding unsigned comment added by 64.55.128.122 (talk) 15:27, 12 April 2017 (UTC)
thread_title:  Nord-Lock and "Delta Protekt" 

message: 109.67.32.70 (talk) 04:11, 24 August 2019 (UTC)
thread_title:  What's the ethymology? Is it a name?