Belt Sander 2000x50 / 72"x2"

[RobWilson]

Evening Chaps 



It being to cold for shop work in the evenings ,especially when one has been out in the cold and wet all day .I thought I would make a start on my belt sander project , 

I have just about all the materials about 95%  . The last to arrive was the VFD and the 2.2Kw 2800rpm flange mount motor . 






I bummed a wee bit of 180 mm dia  ally bar to make the drive pulley and a larger contact wheel from .






And these  are some of those toxic to North American belts    , I hear Marmite and Vegemite are also banned LOL ( I personally love the stuff )   



The wheels I probably will probably not use , I plan to make my own ,part of  that missing 5% is rubber 




So the design so far , this is still very much a work in progress as I have a lot of ideas to flesh out . 


 





The flat platen .









Cheers Rob

[RobWilson]

Done a wee bit work on the three contact wheel head and the larger 8" contact wheel designs .

The yellow line depicts the belt path ,the various ways it can be laced . 






The above will have  70mm,100mm and 130mm rubber contact wheels . 



Cheers Rob 

[EdK]

Looking good Rob. I'll be watching this thread since one of those tools is on my long list of projects.

Ed

[Roadracer_Al]

Are you planning on buying or making the contact wheels?

Fine looking belt grinder! My own belt grinder build stalled. :(

[RobWilson]

(01-21-2016, 04:51 PM)EdK Wrote: Looking good Rob. I'll be watching this thread since one of those tools is on my long list of projects.

Ed

I hear you Ed ,,,,,,,,,,,,, the list is long and time is short 

(01-21-2016, 11:14 PM)Roadracer_Al Wrote: Are you planning on buying or making the contact wheels?

Fine looking belt grinder!  My own belt grinder build stalled.  :(

Hi Al , I am planning on casting my own wheels in Urethane  , just pondering on what Durometer to get , probably a Shore A 50  ish lol . 

How far along is your build ?  


Cheers Rob 

[DaveH]

Looks good Rob,    except for the last pic, .................. you just put that in to test us  
 
DaveH

[RobWilson]

(01-22-2016, 01:41 PM)DaveH Wrote: Looks good Rob,    except for the last pic, .................. you just put that in to test us  
 
DaveH

Cheers Dave ,     whats wrong with the last pic mate   looks good to me . 


Rob

[DaveH]

All the grinding debris and dirt on the belt will get embedded into the two polyurethane wheels.

 
DaveH

[RobWilson]

Hi Dave , 

That's not a problem as the rubber contact wheels are consumable ,and being rubber it does not mess with the belts sanding grit/medium  as a solid wheel would , 

 the reason for lacing the belt in such a  way means the belt conforms to more of the  wheel circumference  .instead of just 45 degrees of contact there is 180 degrees of contact .

  Some of the wheels I will be making will be down to one inch in diameter so without lacing under two wheels there would be very little radius to work with . 


Clear as mud , lol 


Cheers Rob

[Roadracer_Al]

You can always cast extra wheels, if the double-loop puts too much wear on the contact wheels.

I've considered a similar belt arrangement for a tube-notching fixture for a belt grinder.

I bought all the bits & pieces (almost said "bits & Bobs, but don't want to offend any Roberts), and have the main frame built.

It's the work table(s) which have stalled me. I want to have one accessory table which the work is clamped to the table, and the table slides on rails -- sort of like a surface grinder. The problem is I want it to be "universal", i.e. tilt in 2 axis. It's getting complicated.

Part of the 'design brief' for my belt grinder is that it is to be laser or water-jet cut from 1/4" plate steel and welded together.

Keep us posted on the urethane casting. I'd be extremely interested in knowing more about that.