I finished modifying and refurbishing this sander a few months back but didn't do anything about dust extraction until now.
So far I have opened up the belt port approx. doubling the cross sectional are of the port and added some 4" ducting to the end of the rectangular opening so that some flexy can be connected to it. I have also added some extraction to the disc as it had nothing before.
At some stage I will plumb a length of 6" ducting over from the main line but up until then I'll be using the 3 flexies attached to the BS which is nearby.
The belt old port (shown in the photo below) on top of the new one, was opened up by cutting the tapering end off with a bandsaw and a 100mm length of 4" ducting was heated with a hot air gun and pushed over the port to make the ducting conform better to the opening. The ducting is held in place with some short 3/16" bolts.
Ideally 6" ducting would have been better but the gap between the hood around the end of the belt, and the belt is very narrow and until that is attended to there is little point in fitting bigger ducting
The sanding disc is a bit trickier as the gap between disc and the steel post that supports the work table is restricted to using 4: ducting.
The ducting I used for this was comms channel ducting. This is a bit sturdier than Sewage or storm water so it can better take the brackets made out of valve angle.
The suction direction is deliberately designed to follow the direction of rotation of the disc.
The other end is deliberately kept open to aid in maintaining the CFMs
Here is another shot from underneath and you can see how the brackets hold the ducting in place
How does it work? While it's better than nothing by a long way, it does need more work.
The belt hood needs access to more air, and some coarse dust does spill out onto the disc work table.
Using the particle counter I found I could keep an adequate lid on the overall level of fine dust in the shed while sanding by opening the 6" lathe hood which is just across the alley way from the sander.
I will post more as things develop.
So far I have opened up the belt port approx. doubling the cross sectional are of the port and added some 4" ducting to the end of the rectangular opening so that some flexy can be connected to it. I have also added some extraction to the disc as it had nothing before.
At some stage I will plumb a length of 6" ducting over from the main line but up until then I'll be using the 3 flexies attached to the BS which is nearby.
The belt old port (shown in the photo below) on top of the new one, was opened up by cutting the tapering end off with a bandsaw and a 100mm length of 4" ducting was heated with a hot air gun and pushed over the port to make the ducting conform better to the opening. The ducting is held in place with some short 3/16" bolts.
Ideally 6" ducting would have been better but the gap between the hood around the end of the belt, and the belt is very narrow and until that is attended to there is little point in fitting bigger ducting
The sanding disc is a bit trickier as the gap between disc and the steel post that supports the work table is restricted to using 4: ducting.
The ducting I used for this was comms channel ducting. This is a bit sturdier than Sewage or storm water so it can better take the brackets made out of valve angle.
The suction direction is deliberately designed to follow the direction of rotation of the disc.
The other end is deliberately kept open to aid in maintaining the CFMs
Here is another shot from underneath and you can see how the brackets hold the ducting in place
How does it work? While it's better than nothing by a long way, it does need more work.
The belt hood needs access to more air, and some coarse dust does spill out onto the disc work table.
Using the particle counter I found I could keep an adequate lid on the overall level of fine dust in the shed while sanding by opening the 6" lathe hood which is just across the alley way from the sander.
I will post more as things develop.
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