70e plastic flywheel, 3-D printable?

[7sleeper]

@bigrichard81,

Thanks ALOT!!! for bringing this topic to us! Can't wait for the first few requests to make new custom parts(intake, new airfilter design, etc.) on a chainsaw! Now just think about it, someone is unhappy with his Husqvarna filtration and makes a new intake to adapt a Stihl airfilter to it... The ideas are endless!

Thanks alot again!!!

7

 

[olyman]

@bigrichard81,

Thanks ALOT!!! for bringing this topic to us! Can't wait for the first few requests to make new custom parts(intake, new airfilter design, etc.) on a chainsaw! Now just think about it, someone is unhappy with his Husqvarna filtration and makes a new intake to adapt a Stihl airfilter to it... The ideas are endless!

Thanks alot again!!!

7

and any plastic obsolete parts,,that are unobtanium!!!!

 

[bigrichard81]

@bigrichard81,

Thanks ALOT!!! for bringing this topic to us! Can't wait for the first few requests to make new custom parts(intake, new airfilter design, etc.) on a chainsaw! Now just think about it, someone is unhappy with his Husqvarna filtration and makes a new intake to adapt a Stihl airfilter to it... The ideas are endless!

Thanks alot again!!!

7

Absolutely. I don't comment much because there are so many guys here that really understand 2 strokes and chainsaws. When I saw this thread I figured it is an area I have a good amount of experience due to my job and other hobby. Hopefully others can come up with some ideas and we can make them happen.

 

[Chris-PA]

@bigrichard81,

Thanks ALOT!!! for bringing this topic to us! Can't wait for the first few requests to make new custom parts(intake, new airfilter design, etc.) on a chainsaw! Now just think about it, someone is unhappy with his Husqvarna filtration and makes a new intake to adapt a Stihl airfilter to it... The ideas are endless!

Thanks alot again!!!

7

Intake/filter adapters are items I have been thinking about, and seem to be good applications for the process. I have one in particular I'd like to do, but it gets complicated as I would need to make some other means of attaching part of the cover if I changed the filter design.

Also, the process does have limitations, especially the need to print support structures under any overhanging features - that support must then be cut away which is sometimes a PITA. One tries to design parts that don't need support, but that is not always possible. Even with support sometimes the overhanging surface is not as accurate or smooth as others.

Last week I was designing a small fixture for our surface mount (electronics) part placement machine and had trouble with this issue, so I had to make the part in two pieces. I tried forming one half with small pins that went through holes in the other part, and melting them down with a soldering iron to join the parts - it worked surprisingly well!

Here is an example of what the support looks like during printing - this is actually a tool for use in modifying a chainsaw (I'll make a post on it when it is done). The actual part is in the middle and all the stuff surrounding it is a support structure for features that will be printed later and will overhang that area:

 

[bigrichard81]

Intake/filter adapters are items I have been thinking about, and seem to be good applications for the process. I have one in particular I'd like to do, but it gets complicated as I would need to make some other means of attaching part of the cover if I changed the filter design.

Also, the process does have limitations, especially the need to print support structures under any overhanging features - that support must then be cut away which is sometimes a PITA. One tries to design parts that don't need support, but that is not always possible. Even with support sometimes the overhanging surface is not as accurate or smooth as others.

Last week I was designing a small fixture for our surface mount (electronics) part placement machine and had trouble with this issue, so I had to make the part in two pieces. I tried forming one half with small pins that went through holes in the other part, and melting them down with a soldering iron to join the parts - it worked surprisingly well!

Here is an example of what the support looks like during printing - this is actually a tool for use in modifying a chainsaw (I'll make a post on it when it is done). The actual part is in the middle and all the stuff surrounding it is a support structure for features that will be printed later and will overhang that area:

View attachment 398327

If you can modify your printer and run dual extruders you can print HIPS as the support material which dissolves in limonene or PVA which dissolves in hot water. That way you don't have to spend a bunch of time cleaning up the print after.
When the parts are more complex I split them into a couple different parts then use super glue which chemically reacts with most plastics and creates a great bond.

 

[Chris-PA]

If you can modify your printer and run dual extruders you can print HIPS as the support material which dissolves in limonene or PVA which dissolves in hot water. That way you don't have to spend a bunch of time cleaning up the print after.
When the parts are more complex I split them into a couple different parts then use super glue which chemically reacts with most plastics and creates a great bond.

The guys that built the one we're using are locals and people we've worked with in various capacities for some time - they're working on a dual head/material printer now, so we're going to let them do the development.

You might want to give the melt-down post assembly a try sometime, it worked quite nicely.

 

[bigrichard81]

The guys that built the one we're using are locals and people we've worked with in various capacities for some time - they're working on a dual head/material printer now, so we're going to let them do the development.

You might want to give the melt-down post assembly a try sometime, it worked quite nicely.

What is the melt down post assembly?

 

[psuiewalsh]

Several members were looking for HI top 288 covers which are NLA. How much do you think it would cost to remake those? Seems like they would be easier than the fan.

 

[woods works]

Put some more time on it sunday. 20-some more cuts in 12'' oak, about a half tank gas. Saw tach-tuned to 10500 rpm, ran over 11500 at times while setting. At this point I'd give an A+ score and would feel good using on a full-time pro saw. These old jony's are more of a shelf queen type used for fun once in a while.

 

[Chris-PA]

What is the melt down post assembly?

Here is a screen shot of the assembly - the two colors are two different parts of the assembly. Once put together the posts that stick through are melted down (forming plastic rivet heads) to join the two parts.

 

[bigrichard81]

Here is a screen shot of the assembly - the two colors are two different parts of the assembly. Once put together the posts that stick through are melted down (forming plastic rivet heads) to join the two parts.

View attachment 398335

That's interesting. What do you use to melt and form the rivets?

 

[Chris-PA]

That's interesting. What do you use to melt and form the rivets?

I melted them with a soldering iron, then shaved them flat with an X-acto knife. The holes in the top piece were tapered slightly (like a countersink) so that the melted plastic could fill the cavity.

 

[bigrichard81]

I melted them with a soldering iron, then shaved them flat with an X-acto knife. The holes in the top piece were tapered slightly (like a countersink) so that the melted plastic could fill the cavity.

Cool. Simple enough and I don't have to buy any new tools (even though I look for any good excuse). I'll have to try it out.

 

[joe25DA]

Nice work! That fan looks as good or even better I doubt any failure

 

[adubbert]

are these fans for sale and if so how much I would really like to get my hands on one

 

[bigrichard81]

I haven't sold any, just gave the ones shown in the post to WoodsWorks to try out.

 

[Definitive Dave]

Figured I would ask here as a couple of you guys seem to have some plastics knowledge
I am looking at having a few parts remade that are NLA and in decent demand, like 084 top covers.
Essentially single piece parts.
I stopped at a local plastics manufacturer and it turns out they are blow molders.
I am not even sure what type of company I should be looking for, any advice?
Dave

 

[olyman]

I haven't sold any, just gave the ones shown in the post to WoodsWorks to try out.

I do hope, sir,, that you are pushed by folks on here, to pursue it.. there are a lot of older saws,,that need some parts, that are nla.....

 

[adubbert]

I really need one as the one I had in my saw destroyed itself.I use me 70 e for powering my lewis chainsaw winch which I will hopefully be needing for moose hunting this fall.Would you make one for me and if so how much?

 

[Jimbo209]

I haven't sold any, just gave the ones shown in the post to WoodsWorks to try out.

I'm with dave AV mounts and other bits WILL sell for sure