better hobbed bolt

Replaced with recessed hobbed bolt and filament stays centered, throughout the print.

 

Harry, if you look at this, is there a spec on the current hobbed bolt? Or even just the bolt dimensions?

 

Well, how about the length, the size, the shoulder length, the pitch, distance to the hob, hob width.

 

Basically, looking to find out a way to buy a backup bolt with more of a channel in case the stock one needs replacing.

 

I don't care about any of those values... as long as someone can point me to a link to buy the bolt I need!

 

Harry, I know it comes with a bolt. I'm more interested in finding a bolt with the proper recess. Basically, anything cheap to improve the quality of my prints/reliability of the machine off the bat is on the table.

 

It's probably standard, It's a wade extruder so any hobbed bolt that works with the extruder should work with the RoBo.

 

http://www.ebay.com/itm/181167830956?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

m8 bolt, with 26mm hobb, this will get installed with the nut on the backside instead of the gearside.

if you get a similiar one to robo where the bolt installs with the nut on the gear side. the hobb is about 14.5mm

i haven't tried this one yet, I bought it to replace the one that I took out of my other printer, to use in the robo.
but dimensional wise, it looks like it will fit. It comes with hardware to space it so the hobb is where you need it be, so its somewhat adjustable.

 

Printrbot sells a decent looking hobbed bolt http://printrbot.com/shop/hobbed-bolt/

 

I am currently having issues with the filament slipping off the Hobbes bolt and looping inside the extruder.

Which one of these would be better for RoBo?

 

This is what I'm getting. The nozzle is not clogged when this happens.

It's happened a couple times.

 

As I don't have a printer yet, I can't speak to the fit, but this: http://www.thingiverse.com/thing:48859 or something like it could be one part of the answer. If you look at the number of filament jam solutions people have posted, it seems to be a common problem. Personally, I plan on replacing the hobbed bolt with the one Cambo recommended above as well as adding a guide to help keep the filament centered. If I ever get a printer.. when I get a printer...

 

Cambo... I ordered one of the bolts you recommended from ebay....

 

Me too.

 

Cambo just got that guy a lot of business

Ordered one as well