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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Clearance on shear blades?
We have an old 8 ft shear. Bersch is name on nameplate and when i last
tried to find any info i found nothing. I'm wondering about setting the clearance for the blade. Its worked fine in the 3 years i've worked here but we almost always only shear steel of 10ga and thicker. I've cut a sheet of 1/4 and 8ft long with no trouble. Now the boss is talking about shearing some sheets of 25 guage and he's concerned it is too thin. I checked and found clearance to be mostly around .004 and at far end it was down to .002. I've been told some shears are not setup with equar clearance. So i'm wondering if anyone has any general rules about shear blade clearance. I thought i would hold off trying to get everything close to .002 till i saw if anyone with some actual knowledge had any advice. Rosco |
#2
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Clearance on shear blades?
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#3
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Clearance on shear blades?
Butter writes:
I thought i would hold off trying to get everything close to .002 till i saw if anyone with some actual knowledge had any advice. You must have a proper clearance for effective cutting. Too much or too little is bad. Rule of thumb is 5 to 8 percent of material thickness. Your 0.002" figure will thus cover about 0.020" to 0.050", which is a useful range for typical work. Adjust the tool to keep this all across the blade width, not just at the ends, but especially at the starting end. |
#4
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Clearance on shear blades?
On Oct 22, 10:16*pm, Richard J Kinch wrote:
Butter writes: I thought i would hold off trying to get everything close to .002 till i saw if anyone with some actual knowledge had any advice. You must have a proper clearance for effective cutting. *Too much or too little is bad. Rule of thumb is 5 to 8 percent of material thickness. *Your 0.002" figure will thus cover about 0.020" to 0.050", which is a useful range for typical work. *Adjust the tool to keep this all across the blade width, not just at the ends, but especially at the starting end. You got me thinking. Why would the clearance be any different than on a die? If this is the case we've had too little clearance since it was set years ago. We do not use this shear very much and its only because the boss can't find anyone to buy it that its still here. Since after this upcoming job for this thin guage mateiaiwe'll be using it for the thinker steel i guess i need to then increase the clearance to acomodate this. Rosco |
#5
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Clearance on shear blades?
Butter wrote:
We have an old 8 ft shear. Bersch is name on nameplate and when i last tried to find any info i found nothing. I'm wondering about setting the clearance for the blade. Its worked fine in the 3 years i've worked here but we almost always only shear steel of 10ga and thicker. I've cut a sheet of 1/4 and 8ft long with no trouble. Now the boss is talking about shearing some sheets of 25 guage and he's concerned it is too thin. I checked and found clearance to be mostly around .004 and at far end it was down to .002. I've been told some shears are not setup with equar clearance. So i'm wondering if anyone has any general rules about shear blade clearance. I thought i would hold off trying to get everything close to .002 till i saw if anyone with some actual knowledge had any advice. Rosco http://www.tskgrinding.com/shear-bla...clearances.asp HTH, Wes |
#6
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Clearance on shear blades?
Thanks- This is exactly what i've needed
Rosco http://www.tskgrinding.com/shear-bla...clearances.asp HTH, Wes |
#7
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Clearance on shear blades?
Butter wrote:
http://www.tskgrinding.com/shear-bla...clearances.asp HTH, Wes Thanks- This is exactly what i've needed Rosco Glad to have helped on a real on topic question. Wes |
#8
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Clearance on shear blades?
Tell me clearance in mm & for tickness of the material in mm also. Please.
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