Are they directional? Yes or no.
Are they directional? Yes or no.
Yes, they need to be perpendicular to the bolt/screw.
Fish have fins, they swim
I don't know, but one place I used to buy hardware from had slightly cupped flat washers. I installed them cup down for whatever reason.Originally Posted by Dixie-Raven
War Eagle Blackhawk 2170 - Suzuki 150, MG Xi5
Lowrance HDS 7" & 9" - Twin Talon 12' Anchors
Standard flat washers are not directional. A cupped washer is used with the bolt pushing down against the cup to create tension.
From working in a machine shop in the past , Yes , they go on a certain way. One side of the bolt hole will be smooth and the other will have an edge you can feel. That side goes down. Least that was what I was taught
No.
Brandon
1996 Ranger 362XT
Johnson Faststrike 150
many are stamp cut leaving a burr around the rim on one side. I try to put that burr side down.
Last edited by Skeeterbait; 05-12-2021 at 10:45 AM.
Burr side down
Shiny side up, but it's just an OCD thing.
Like with aluminum foil.
Exactly!!Like with aluminum foil.
Yes they are, and this is why.
So discounting marring any paint finish is there any engineering reason why the burr side should be down or up? Does the burr side help with clamping force or water-tightness.
My answer is it depends on what the goal is and what material is being used. Example plastic vs metal, painted vs non-painted, etc...
It's something you learn to feel for after years of experience assembling things. A good washer doesn't have an up or down side, the chamfer is equal.
On a used nut, however, you can usually feel which side was in contact with the last assembly and maybe it's O C D, but that side goes "down".
Some flat washers, are actually slightly curved. Called Belleville washers. And they need to be put hump side facing up
Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html
No. I was being a wise-apple. From a mechanical design perspective, no, there is no difference if the washer is truly a flat washer. It's only there because most of them are stamped from a sheet. If a person is really want to stop marring from occurring, then the "burr" side should be facing the head of the fastener. Belleville washers are to be "hump" facing up so as to create a small amount of tension between the head and the locking device.
Bwahahaha!
2022 Ranger Z520R, 2022 Mercury 250 ProXS 4s
Dual 16” Lowrance Live’s at console, 12” Live with Active Target, Garmin 8612 and Livescope, and Humminbird 12” Mega 360 at the bow
Lowrance Ghost TM
Yes. The sharp edge down in almost all circumstances except when doing something with a Phoenix/triton dash with the Vinyl covered plastic then it is important to pout the rounded side down first
Mercury 250 proxs 2B115089
Speaking of washers.... it sure bugs me that they make the hole so big on them...
Is this thread like which way the toilet paper roll is to be mounted in the dispenser ?
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