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Posted by Doug White on March 7, 2006, 9:47 pm
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>>I just picked up a used DiAcro 12" shear. It's in pretty good
>> condition, with a little surface rust. The one thing that has me
>> concerned (and puzzled) is that the "apron" in front of the blades is
>> bowed up in the middle. This is the platform that the sheet metal sits
>> on as you feed the stock into the cutting area. There is a ~1" wide
>> section before you get to the blades that's part of the casting, but
>> the main work area in front is a piece of plate steel (probably cold
>> rolled) about 16" wide by about 10" deep. It's held down on each side
>> by a 1/4-20 flathead screw.
>>
>> This piece bows up about 50 thou a little to the right of center, so
>> there is a step down to the level of the casting & fixed blade.
>
>Is it this one?
>
>http://web.archive.org/web/20041015034557/www.diacro.com/pdf/manuals/12_&_24_Ha
>nd_Shear_Manual.pdf
>
>If it is, it looks like you may be missing a screw that's supposed to hold
>the plate down in the center. It also looks like, with the exception of the
>hole for the squaring guide you could probably turn the plate over and bolt
>it down to take the bow out of it since it would be straightened when it was
>forced down against that edge you mentioned. The holes may be countersunk
>too which would pose a bit of a problem though.
It's the #12 shear shown in the manuals, but there isn't a screw in the
middle of the apron. I suspect this is either a design change, or was
only present in the 24" model. The plate has countersunk screw holes,
which makes inverting it a problem. In addition, the amount of force
required to flatten the bowing would be very hard on the screws. I'd
still wan to flatten it a bit in any event.
Doug White
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>> condition, with a little surface rust. The one thing that has me
>> concerned (and puzzled) is that the "apron" in front of the blades is
>> bowed up in the middle. This is the platform that the sheet metal sits
>> on as you feed the stock into the cutting area. There is a ~1" wide
>> section before you get to the blades that's part of the casting, but
>> the main work area in front is a piece of plate steel (probably cold
>> rolled) about 16" wide by about 10" deep. It's held down on each side
>> by a 1/4-20 flathead screw.
>>
>> This piece bows up about 50 thou a little to the right of center, so
>> there is a step down to the level of the casting & fixed blade.