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Axminster NVD750 Numatic dust extractor

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I finally got a dust extractor for the workshop.
My Hoover would not filter out any fine dust and so things were becoming unhealthy.
I read on another website "Get an air filter, or be an air filter".
I'll be doing some wood turning in the lathe and some routing soon (all indoors) and a dust extractor is now a must have item.
I bit the bullet and spent 310 pounds.

 

 

 

1. Description
2. Housing for the NVD (in the upstairs workshop)
3. Plastic Nozzle
4. Trolley to move the NVD around (in the new downstairs workshop)
4. Post to hang the hose on
5. Using the NVD with a Mitre Saw

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↓NVD - DESCRIPTION

 

I opted for the Numatic NVD750 with twin motors.
I bought the machine from Axminster in High Wycombe. It has the Axminster colors, but it is a genuine Numatic. I'm getting to like the Axminster white.
It is a nice light compact unit and I can move it about the house easily. This is a big plus for me as I sometimes cut large wood sheets in the kitchen and will need to use it down there.
The vacuum is not quiet. It is fairly noisy but it is not so noisy that it is a great irritation. It is just as noisy as a normal house vacuum.
I can hear the vacuum running from every room in the house.
I can only just barely hear the vacuum when standing outside the house in the garden. I'm sure it will not bother the neighbours when I run it for long periods.
With 2kw of power consumption the machine gets very hot.
It will suck your eye out. I've already lost a heavy screwdriver up the hose and I will have to go digging in the bag later for that.
It does a great job of keeping the workshop clean and collecting dust from power tools.
The 3 stage filtration system means the exhaust air is virtually dust free.
I am extremely pleased with the machine.

It comes with:
Twin 1200w motors
4m x 100mm hose
2.9m x 32mm hose and step down adapter
5 filtered bags
An extra filter bag that is already cut in half (for use in wood chip mode).
1st stage round red filter
2nd stage round white filter
A nice long sturdy power lead
2 year guarantee

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↓NVD - HOUSING (in upstairs workshop)

 

↓The NVD will sit to the left of the lathe.
It is vulnerable there and it will get covered in oil and swarf and things will get dropped on and around it.
I decided the best thing to do would be to make a housing for it.
The housing will protect the NVD and also muffle down some of the noise.
When necessary I will be able to quickly dismantle the housing and move the NVD out.

 

 

↓Here is the space to the left of the lathe.

 

↓The homemade carcass is moved into position.
I decorated the back bedroom recently and disposed of an old bed and also removed the previous owners chipboard shelving.
I recycled, and used the chipboard and the wood from the bed to make the housing.
The slot for the electric cable is at the top left.

 

↓The NVD is lifted inside the carcass.

 

↓The front piece of the housing is secured with wing nuts.

 

↓The top back piece is secured with wing nuts.

 

↓The top front piece is secured by press fitting it onto a couple of 3mm metal studs.

 

↓The housing is pushed back into position.
The 32mm hose is connected to the NVD.
The hose will reach everything in the room from there.

 

↓The 32mm hose tucks away very nicely.
I have also gained a little bit of workspace on top of the vacuum housing.
The little filler piece on top and at the front of the housing can be easily removed to ventilate the NVD if it gets too hot.

 

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↓NVD - NOZZLE

 

↓After a few hours use I found the Numatic nozzle was getting battered and worn. I made a sacrificial nozzle out of 38mm plastic waste pipe.

 

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↓NVD - TROLLEY

 

I have moved the workshop into a bigger room and plan on moving the NVD to different areas in the shop as needs be.

 

↓ To move the NVD around easily I made a trolley out of two circular pieces of plywood and 4 Swivelling Castor Wheels.

 

↓ I permanently attached the trolley to the bottom of the NVD.
The 4 pozidrive screws hold the two pieces of plywood together.
The 4 M6 nuts and bolts secure the plywood to the bottom of the NVD cannnister. This meant I had to drill 4 holes in the cannister.
I drew 2 pencil lines passing through the centre of the circle, and at right angles to each other.
The screws securing the two plywood pieces together are located on the pencil lines.
The swivel castors are aligned to the pencil lines.

 

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↓NVD - POST FOR THE HOSE

 

The long hose was awkward to tidy up each time, so I made a post to hang it on. I'm well pleased with the post idea.
The vacuum hose post consists of a 16mm steel tube, a top bracket and collar, a bottom bracket, and a wire holder.

↓ Here you can see the post with its wooden bottom bracket, and metal top bracket.

 

↓ Here you can see the vacuum hose is well clear of the floor.

 

↓ Here is a view of the top bracket.
The top bracket is made from a piece of 30mmx30mm angle. The top bracket is bolted to the existing makers black bracket.
The circular collar is pinned to the post. The collar stops the post from moving down and bearing down on the wooden bottom bracket.
You can just see the pin in the periphery of the collar.
The post just slides through the top bracket and I can pull the post out of the top bracket if I need to.

 

↓ Here is a view of the wooden bottom bracket.
The wooden bottom bracket stops the post from flopping around.

 

↓ Here is a view of the wire hook at the top of the post.
The 4mm wire hook holds the hose up off the floor.

 

 

 

UPDATE [06-12-15] - I was not happy with the wooden bottom bracket so I spent a bit of time and made a metal one.

I made the bottom bracket out of a 30mm wide bar.
I drilled a 16 mm hole in the end of the bar.
I rounded the end of the bar with the aid of a file and a filing button.
↓The filing button is on the left. The bottom bracket being rounded is on the right.

 

↓The filing button was made from a piece of round offcut.

 

↓Here is the bottom bracket with a rounded end and a 16mm hole for the post.

 

↓The bottom bracket is attached to the underside of the trolley.

 

 

↓The metal bottom bracket is neater than the wooden one.

 

 

 

 

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↓NVD - USING THE NVD WITH A MITRE SAW

 

I have to cut up a lot of wood indoors for the new workshop. The debris from a Mitre Saw flies everywhere, but I have managed to effectively contain the mess using the NVD, the Axminster Jet AF-500 Air Filter unit, and a large cardboard box.

↓ This is the Mitre Saw set up.
The large cardboard box captures much of the debris.
For this application, I use the 100mm hose that comes with the NVD. This large hose moves a lot more air than the smaller 32mm vacuum hose.
The 100mm hose enters the box from the left, creates a strong negative pressure, and helps retain the debris inside the box.
I connected a 40mm waste pipe to the extraction port of the Mitre Saw. This directs some of the debris to the inside of the box.
The top flap of the box is held open for these pictures. When I use the Mitre Saw, I move the top flap down and this helps contain the debris in the box.
You can see the Axminster AF-500 Air Filter unit behind the box. The box does not caprture all the debris and some of it escapes into the surrounding area.
The Jet AF-500 is a good piece of kit and does a really good job of capturing the air borne particles.
The combination of the box, the NVD, and the Jet AF-500, means there is very minimal dust settlement on surfaces in the room.

 

 

↓ The 40mm waste pipe directs some of the debris to the inside of the box.

 

↓ The bottom flap of the box helps to contain a lot of the debris.
The top flap is pinned back for this picture, and is normally left to flop down over the saw.

 

You can see part of the Jet AF-500 Air Filter unit to the left behind the box. I leave this unit running for a good few hours after using the saw.

 

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