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2x72 grinder discussion

I was curious about dust too. Seems like a lot of knifemaker guys have a 5-gal pail underneath, some containing a couple inches of water. Presumably serves to both catch majority of grindings for easier sweep-up & also immediately extinguish them. Now if you have belt head orientated in horizontal mode, just rotate picture 90-deg either way & yeah, different considerations. But I wonder - is 90% of the ground material contained within this kind of spark cone immediately below the grinder & the rest is airborne settling somewhere else in the shop? I'm thinking metal cant fly very far like wood dust can, but obviously some does.

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A 2x72 grinder is on my list as well, and I go back and forth between jer's plans or a housemade kit, or wondering whether I could make do with a vevor unit, which strikes me as a pretty cost-effective entry point at $1100 for a 2hp/vfd package (assuming they get back in stock).
 
I got a quote for a four parts in 5/8" A36 hot rolled steel. All other cuts are straight and can be purchased close to final dimensions requiring little milling so I've excluded them.

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The quote was for $176 plus HST plus delivery is selected. The system says thee is a warning but provides no details of the warning. I suspect it is because I laid out several parts in one DXF file rather than allowing them to use nesting software. They can't improve on this nest though.

I could drop all my small pilot holes and likely lower the costs further. In fact since they laser cut and the edges harden I think that is what I'd do anyway and then just layout the holes later.

Lets see what submitting a new dxf file does for the price


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second quote saved $40 by eliminating pilot holes.

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I can likely squeeze another one or two small parts into this nest if I wanted to as well but the charge is based on linear cut length, and being square other parts dont benefit from lower labour or savings.

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DavidR8 said:
Geez that seems really cheap!
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That seems very reasonable... I'll have to see what my total metal bill was and how much I paid for the plate large enough to mill my main plate from for comparison.

I think I'm going to pull the trigger on this... or use this to leverage my local waterjet guys to price match. Save the long drive and hardened cut margins
 
If that's send cut send, don't forget that's USD....Even when you go to the "Canada" section of the website.....Fool me once.....

Try, https://www.cutmyparts.ca/ or https://www.readysetcut.ca/ instead. A canadian option from the GTA. Similar interface to sendcut send, and although I have not used either them yet, I did upload the exact same parts to readysetcut, I used sendcutsend for and they were much cheaper......
 
Dan Dubeau said:
If that's send cut send, don't forget that's USD....Even when you go to the "Canada" section of the website.....Fool me once.....

Try, https://www.cutmyparts.ca/ or https://www.readysetcut.ca/ instead. A canadian option from the GTA. Similar interface to sendcut send, and although I have not used either them yet, I did upload the exact same parts to readysetcut, I used sendcutsend for and they were much cheaper......
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I did cutmyparts.... in orangeville so I guess they are CAD.

I just submitted the cheaper part to ready set cut. They dont offer 5/8 steel. 1/2" the part was more money at $159 plus HST. A nogo
 
send cut send reports an open entity which the file does NOT have, so their system is flawed. I'll try to do something to make it work

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How much more closed can entities be? Obviously their read algorithm is pooched

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finally, I had to extrude the part in fusion, create new sketch from profile, export new dxf. Import the 4 parts files into nested dxf file.

Then I was able to get send cut send to quote on the combined parts. They only have 1/2" part capability.

NOTE when I uploaded individually they priced each part much higher than the parts in a nested dxf file. main part $94, platen arm $56, hinges $21.53

Based on $150 USD it will be $216 CAD plus HST then for sub-sized parts I can get for ~135 CAD locally

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yea, that would be beefy, shipping is going to be hefty. going from 3/8 plate to 5/8 has to add a good 10lbs

how much shaft does your motor have ? i assume your using a c-face motor ? a lot of the wheels the bore isnt the entire width of the wheel, its often a bit in from the edge of the wheel. Im sure you can see where im going with this, something to consider.
 
phaxtris said:
yea, that would be beefy, shipping is going to be hefty. going from 3/8 plate to 5/8 has to add a good 10lbs

how much shaft does your motor have ? i assume your using a c-face motor ? a lot of the wheels the bore isnt the entire width of the wheel, its often a bit in from the edge of the wheel. Im sure you can see where im going with this, something to consider.
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I am picking up the parts if I get the cut.

IDK is Jer's main plate only 3/8"

The one I'm making is this, I have 5/8" for the main motor mount, the platen arm, hinges and the grinding table only. I already have all the metal but like the idea of cnc cut parts for the four 5/8" parts. I can use the plate I have elsewhere


1738197561216.png
 
TorontoBuilder said:
second quote saved $40 by eliminating pilot holes.

View attachment 58860

I can likely squeeze another one or two small parts into this nest if I wanted to as well but the charge is based on linear cut length, and being square other parts dont benefit from lower labour or savings.

View attachment 58861
Click to expand...

I changed the quote to two sets, and the price dropped to $113 each set plus tax.

I wonder what 3 sets would cost... $107 each, 4 sets are $103.5 each.. I dont expect any further savings. 6 sets brings it to $100 each
 
I assume your talking about 'jer schmidt'? ive looked at his videos, to me, it looks like the thickest section on his belt grinder is maybe 1/2". I also dont see a grinder he has built using a c-face motor, so he is not loosing any shaft length for the plate.

i would measure the wheels you have/get, measure the shaft, and make sure that using 5/8 isnt going to give you problems with shaft/bore engagement before you order it up
 
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