what is the reason blade isn;t centered? how to fix it? thank you
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what is the reason blade isn;t centered? how to fix it? thank you
I would think that either the holes were not drilled correctly or the pin is bent.
Sometimes the blade is ground slightly off center, this happened often in older vintage “near wedge” razors. Back then they used a single wheel to grind the hollows, one side at a time.
Also older blades, sometimes the taper of the tang is not ground even with the axis of the blade and that will throw the blade to one side or the other.
I suppose they weren’t too concerned about the “precision” of the grinding because it would shave as well as one that was ground evenly, and the finisher could “adjust” the new scales to fit… easily done with horn.
Sometimes the one scale would shrink more that the other and that would cause the pivot holes to go out of alignment… but more often celluloid scales with inserts, both scales may scale shrink at the same rate, however the metal insert on the front scale will not, so the front scale will warp throwing the butt end out of center.
I have stopped worrying about a blade's pivot hole drilled off centre, the pivot pin will always be a “loose fit” in the hole, so if the holes in the scales are centered and all other things being OK, then the blade will center.
And of course, a badly warped blade would do the same… I guess nothing is perfect but this makes for interesting variety.
I am working on a W&B with what appears to be either an off center grind or a twisted blade (everything is fine from the tang to the heel then goes off center to the toe). I've created the illusion of center by placing an extra washer inside the scales to push the toe more to the middle of the scales.
Bent pin or scale. Repin it or live with it if pin. If plastic or horn scales, you can rebend the scales. Not easy, but doable.
Just an idea that may work.
OK so the blade is off center because it’s warped or ground off center; in any case there is nothing you can do to straighten the hardened steel blade.
However if you are making NEW sales for such a blade you could try this…
When you pin the wedge end, don’t tighten, leave it a little loose. Then pin the pivot and tighten as normal.
Now because the wedge is loose you can now “adjust” the wedge end one way or the other and center the blade, then carefully peen to tighten the wedge and hopefully the blade will remain centered.
Just making sure I understand the process, but adjusting the wedge would essentially just warp the scales in a certain way to conform with the razors shape?
Sometimes it works when you put paper between the scales and the blade before you tighten the pin.
Correct... and depending on the blade warp, you may not have to "warp" the scales too much to center the blade,... it may not be noticeable. but it also depends on how flexible is the new scale material.Quote:
Originally Posted by Leighton
Ever de-pin a razor, and made new scales for it, only to discover the blade has a warp and won't center in the new scales?... but you remember, somehow the blade centered in original scales.
That will also work, once used a strip of an old plastic credit card. Slip between the blade and the scales (only one side), then hit the pivot pin a few times, when the plastic strip is removed the blade appears to move closer to the side that the slip was placed... this is because one side of the scale would stretch (plastic) or stretch the pivot pin hole (wood) and push the wedge end away thus changing the center of the blade.Quote:
Originally Posted by 0livia
Going back to Sham's original question here,
Here is what I have found to be true as to most common to least common
The pivot ends of the scales are simply not evened up
the wedge end of the scales are not evened up
The razor is mis-ground
The easiest way to fix/avoid this is to put you scales back together the same way you tighten screws/bolts.... Way back when you were taught to not tighten one screw or bolt before getting them all started, then to tighten evenly.. Well the same thing applies to putting scales on a razor, you set the wedge, but you do not tighten it in, before you even set the wedge, if you put an adjustable pin through the pivot hole with a mock up tang, then set the wedge this will really help to keep things straight, then you loose set the canter pin if applicable, then finally set the pivot, once they are all loose set, than you start at the wedge end and tighten them in with the blade in the closed position holding it with your fingers in a center position, yeah this takes some practice.... If you do it this way you eliminate the flexing problem and it should set the scales straight and even....
Now assuming that you didn't bend a pin the only other thing that can set you off, is a uneven tang/razor... if you get in the habit of using a 5/64 bit instead of a 1/8 then two things happen, one your chances of getting a pressure split on the scales goes way down, and two that tiny bit of play will allow you to adjust in, all but the worst of bends.... :gl:
This is the exact problem i have. holes looks ok .level etc. don't know why?Quote:
Originally Posted by smythe