Looking for some sub rail angle advice
- Thread starter MISteve
- Start date
Thanks. I'll do that. Here's a picture of the old cushion remounted with double sided tape to measure,
Where do you live, in Jungle!
Now hold on a minute. You at first said the cushions were at 1 1/2" nose height, but looking at your ruler in this picture posted, I'm seeing 1 3/8"ths nose height, which is just about 62.5% of the ball height, which would be in the correct nose height zone for those rails. But I do recognize those cushions and they're garbage! So, if your readings are correct, then yes, do use K66 cushions to replace the ones on those rails, they'll play right. So forget the K55 cushions! It's hard to make a determination about your rails, or any other rails unless I have them in hand and can measure them myself, but according to that roller picture you posted, stay with K66.
1.451 is 1 29/64" nose height, and that's not what I'm reading in your picture with a ruler, I'm seeing 1 3/8"ths there.
The picture I posted with the 1-3/8 measurement is after trimming the cloth to get the rail to sit flat.
Also. Thank you!! (for your continued help) I was just going order some K55 cushions today and start extending the rails. I'm glad you recognized the garbage rails. I appreciate all the advice you've given me.
Oops. Removing, not trimming.
Here's a picture with a few 6 inch rulers. Rail is bolted to table. Rail height is 1-11/16.
And another, (kinda blurry)
Distance to point 1.42-1.93=.49 width of taper. From 1st picture 1-11/16-9/16=1-1/8 (1.125) height of taper. .49/1.125=.4355 The inverse tangent of that gives a rail angle of about 23.535 degrees.
And another, (kinda blurry)
Distance to point 1.42-1.93=.49 width of taper. From 1st picture 1-11/16-9/16=1-1/8 (1.125) height of taper. .49/1.125=.4355 The inverse tangent of that gives a rail angle of about 23.535 degrees.
I don't trust your rules set-up concerning the angle =/- 2 degrees is just a bit, I just don't trust it. But anyway it seem that you need K-66, K-55 would be too much high.
Did you see my previous post about having the rail inspected with a CMM at work? My ruler measurements are very close to what the CMM at work showed.
I deleted my message, I was wrong, K66 are 1/8 approx. higher than K55 and if your measure are good you would need K55, like I said higher with a piece of K55 that would be easy to figure that, Good Luck!
The Cloth under the rails can't effect the nose height by more than the thickness of the cloth itself, a out 1/32" of an inch.
No, K55 nose height sits lower than K66 on the same bevel.
Yes I know, I inversed the cushions in writing, what do you think that he have now K-66 or K-55, that's not clear from their measurements!
What's throwing me off is if the rail is 1 11/16" thick, and the subrail bevel is 23.5 degrees, K66 cushions should have a nose height of just slightly over 1 1/2" whereas K55 would be sitting around 1 27/64"ths. The picture with the cushion and ruler showing a nose height of 1 3/8" tells me the subrail bevel is wrong, not at 23.5 degrees, but actually less, like around 20.5 degrees.
Yes, it's that I though, the way he measure the angle by trigonometry is not as accurate as a good angle finder, but what's the real profil cushion that he have now...??
K66
His measurements are bad then!