Simko's Weld Together OSG

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jeep.eater
Posts: 3
Joined: Sat Oct 13, 2018 10:22 pm

Re: Simko's Weld Together OSG

Post by jeep.eater » Thu Feb 07, 2019 9:20 pm

Hey there Simko I was wondering if you had some measurements for the shims you used behind the wheels just looking to get close without too much back and forth putting it together and taking it apart a bunch of times and getting angry I'm ready for final assembly here after paint and wanna save myself some headache

Simko
Posts: 20
Joined: Wed Jan 17, 2018 2:03 pm

Re: Simko's Weld Together OSG

Post by Simko » Fri Feb 08, 2019 10:22 am

After doing three grinders, I can say that each one was slightly different.

I would get an assortment of 1/2” ID shims (0.060, 0.030, 0.015, 0.010) and start with all of the wheels with just a 0.060” shim between the wheel and the plate and enough shims to make up the extra space on the outside of the shoulder bolt. I didn’t get too technical with the make up shims because the wheel pretty much stayed in place while testing. Once I got it pretty close then I added shims to the outside to take up all of the slop. If you need to shim the inside anymore, just move shims from outside the wheel to inside (between the wheel and platen plate).

It didn’t really take too long to do each one (30-45 mins) and that was really taking my time.

Put on a low grit belt and run the grinder slow so that you can try to stop it before it runs into anything.

Start with the platen wheels and get the belt running centered on those two wheels. After that is centered, look at the tracking wheel to see how much it needs to come out for the belt to be centered on it.

The tracking wheel for whatever reason needed about .120” to get the belt to run centered on it while it was centered on the platen wheels. Doesn’t make sense because it is on the same plane as the other wheels?!?

Sorry I can’t give you any better info. Each grinder is going to be different.

jeep.eater
Posts: 3
Joined: Sat Oct 13, 2018 10:22 pm

Re: Simko's Weld Together OSG

Post by jeep.eater » Sun Feb 10, 2019 9:46 am

Thanks a bunch that will get me rolling

sxt15
Posts: 1
Joined: Wed Mar 27, 2019 7:20 pm

Re: Simko's Weld Together OSG

Post by sxt15 » Mon Apr 01, 2019 2:46 pm

Hey im about to have 4 of the Rev 4 plans cut out. Was just curious are the original DC1 bill of materials the same sizes or did you change any of those. Also do you have a diagram of what needs tapped?

thingsthatcut
Posts: 3
Joined: Mon Jul 15, 2019 11:18 pm

Re: Simko's Weld Together OSG

Post by thingsthatcut » Fri Aug 02, 2019 5:49 pm

How did this turn out?

wdurst75
Posts: 3
Joined: Wed Jul 24, 2019 8:10 am

Re: Simko's Weld Together OSG

Post by wdurst75 » Sat Aug 10, 2019 10:59 am

Simko -

I was hoping(when you have time) could you post or PM some pics of the tracking arm/wheel assembly. I’m trying to find some pics on how this assembles together. I will continue Googling to see if I can find something in the mean time.

I got my frame parts yesterday! Had them laser cut using your Rev 4 drawing.. seems like it will need some filing on the mating spaces between the frame and hinges but I kind of expected that anyway. I am still trying to decide whether to just order all my fastening components from online or try to source them locally. I’m not a huge fan of driving all over town and would almost rather order them and have them in a few days. Haha

I’m super excited about this as it is my first 2x72 and my first grinder build!

Thank you for posting this up! I’ll post pics here when I finish my build and any comments or issues I had while assembling it.

Simko
Posts: 20
Joined: Wed Jan 17, 2018 2:03 pm

Re: Simko's Weld Together OSG

Post by Simko » Sun Aug 18, 2019 7:01 pm

DAB1396E-B0C4-488B-A94B-7CB42DD58161.jpeg
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CBB863FC-79C2-41DF-B2D7-22129F0ABCE2.jpeg (2.55 MiB) Viewed 137 times

wdurst75
Posts: 3
Joined: Wed Jul 24, 2019 8:10 am

Re: Simko's Weld Together OSG

Post by wdurst75 » Mon Aug 19, 2019 12:36 pm

Thanks for posting these pics! This helps give me a better idea of what's happening with the tracking wheel assembly.


Appreciate it!!

C.J
Posts: 4
Joined: Fri Aug 16, 2019 4:12 am

Re: Simko's Weld Together OSG

Post by C.J » Mon Sep 09, 2019 6:27 pm

Hi Simko,

I just had my parts back from the laser cutters, and I was curious as to where there was anything to consider with the wheel set? I wasn't going to buy the OBM set because of price to get it to Australia, however, There is a set on ebay quite reasonably priced I was going to look at. Anything I should consider?

Also, what gas strut size did you use if you don't mind my asking?

Kind Regards,
CJ

Simko
Posts: 20
Joined: Wed Jan 17, 2018 2:03 pm

Re: Simko's Weld Together OSG

Post by Simko » Wed Sep 11, 2019 9:24 am

C.J wrote:
Mon Sep 09, 2019 6:27 pm
Hi Simko,

I just had my parts back from the laser cutters, and I was curious as to where there was anything to consider with the wheel set? I wasn't going to buy the OBM set because of price to get it to Australia, however, There is a set on ebay quite reasonably priced I was going to look at. Anything I should consider?

Also, what gas strut size did you use if you don't mind my asking?

Kind Regards,
CJ
I used OBM wheels and they seemed to be OK quality, I didn’t like that they did not have a spacer between the two bearings which caused them to heat up with even the smallest amount of side loading. If you can find a set with a spacer in the middle, that would be preferred, or you can follow the directions I posted for using a shoulder bolt and shoulder shortening shims earlier in this post. I wouldn’t be afraid to try a cheaper set, just make sure that the drive wheel and tracking wheel are crowned. The OBM wheels have a radius crown, some cheaper ones have a straight peaked crown, and some REALLY cheap ones have no crown.

For the strut I used the parts below. The 30# strut has been perfect. It gives good tension in the middle position for a standard 36 grit belt which allows me to run it tighter/looser depending on the belt type. I ordered the 6 ball studs so that I could pick three positions for the quick release rod ends. If you want to cross reference to something else the compressed length is 3.54”, extended length is 5.9”, stroke length is 2.36”. The compressed and extended lengths do not include the 0.33” long stud (M6x1) on each end.

1) Shock 30#- McMaster-Carr 9416K11 - $11.47 ea
(6) Ball-stud - McMaster-Carr 9512K73 - $1.26 ea
(2) Quick-release rod end - McMaster-Carr 9416K47 - $4.44 ea

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