How to make a good Bench-Clamp

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This bench-clamp is very useful and i tested it and i was impressed over the quality of this simple product.

Please look first to all the pictures to see what it will be.

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I use for this bench-clamp C45 as material with a length of 400mm and a width of 80mm and a height of 50mm.

Note: Use so big as possible, because your clamp is always to small.

First make the two grooves in one time.It’s important that the grooves are parallel.

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A few pictures i made with my telephone and they are not so good. I hope you can see enough.

You can see that i used two clamps. If you want to do it with one it’s all right.

The grooves are: width 10mm  and 6mm height.

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Make a groove of 20mm wide and start at 20mm from one side and stops on 40mm at the other side.

The 40mm side will be the fixed side of the clamp.

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Turn your piece of material 90 degrease and make a T grove. Do the same at the other side.

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Drill a lot of holes in the groove to the other side. I use a 8.1 mm drill and the distance between the centers is 12mm.

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This is the result.

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Now we make at the underside a hole.

I have made it 45mm wide and 340mm long. The depth is to the centers of the holes + 0.3mm.

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with a long cutter you can mill the both top sides.

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This parts is almost ready.

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Now we gonna make the fixed part of the clamp.

Put a piece of material in a clamp like this. Use a roll to be sure that the good side is to the clamp.

Make the whole blok.

The dimentions are 80 X 50 X 45mm

 

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Sorry , i was forgotten to make a picture. Please make a big groove like this. The width is the same as fig1.

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Drill two m8 holes in the block.
( 8.4mm )

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place them together and make two centers in the big block with the 8.4mm drill.  Get the small block off the big block and drill the two holes with a
6.8mm drill and make m8 screw threat in it.

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Make a new block. 80 x 60 x 50 mm.

Do the same as the small block without the drill holes. Put the block on an 45 angle

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and make a flat surface.

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Put the block in the lathe. Make a marker line. It starts in the middle of the small plane. When we drill the hole , it must be somewhere on the line.

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You see that i have place an other block too. This is for the balance.

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Drill a 20mm hole.

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make with a flat cutter a big hole through the whole block. When you have done this, the whole block is ready.

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Then make this part. You can make it of a round peace of steel with a diameter of 20mm. Drill a 5mm hole and make m6 screwthreat in it.

In the lower part you must make a 8mm hole for the pin.

To make a good hole. Drill first 7.8mm and the 8mm. You will see that the hole is exactly 8mm.

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I forget another thing to tell.

In the block i use a 20mm round piece and 80mm long. Make a 7mm hole.

Put all the pieces together with a m6 bold.

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It’s ready.

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It’s a great bench clamp. and very accurate.