120*85*17mm Biesse Parts Rubber Sealing Cover For Vacuum Block Spares Of Biesse CNC Machine

A vacuum block seals on its rubber cover, so a cover that has hardened is why a pod stops holding on one corner and keeps holding on the other three. This one is 120 x 85 x 17 mm, cream, rubber, for Biesse CNC vacuum blocks. The 17 mm height is the number to check against the block: too tall and the pod sits proud, too short and the panel never seals.

Vacuum pods fail slowly and locally. The panel shifts during a cut, the finished part comes out a fraction out of position, and the pod still looks fine from above. The rubber cover is what makes the seal, and once it has taken a set in one zone the leak is permanent until the cover is replaced.

This sealing cover fits Biesse CNC vacuum blocks. It measures 120 mm long, 85 mm wide and 17 mm thick, in cream rubber. The 17 mm figure is the one that interacts with the block: the cover has to compress enough to seal and still leave the panel at the height the machining program expects.

Cream rather than black is practical on a shop floor. Rubber that has picked up glue, dust and coolant turns dark with age, so a cream cover that has gone grey-white at one end tells you where the seal is failing before a panel is cut out of position.

Fit is checked on the cover, not the block: length, width and thickness off the worn part. Send those three numbers with the machine model if you want the cover matched before ordering, and state how many pods the machine carries so the quantity matches the table rather than the refill you happen to have.

What the dimensions and the material do in use:

• 120 x 85 x 17 mm — 120 mm long, 85 mm wide, 17 mm thick; the footprint that has to match the vacuum block it seals.
• 17 mm height — the compression figure: too tall and the pod sits proud, too short and the panel does not seal.
• Cream rubber — ageing shows as a colour shift, which locates a leaking zone before it spoils a panel.
• Biesse CNC fit — listed as a spare for the vacuum block on Biesse CNC machines.
• Sealing face, not the block — this is the replaceable rubber; the vacuum block and pod body are separate items.
• Straight swap — the cover replaces the worn one in the same seat, with no change to the vacuum circuit.
• Wear from panel edges — the cover is the part a panel edge damages, which is why it fails before the block does.
• Three-number check — length, width and thickness off the old cover is the whole fit check.
• Cream, not black — 120 x 85 x 17 mm cover in cream rubber makes a worn seat visible without dismounting the pod.

What a correct cover changes compared with chasing the vacuum circuit:

• Seal restored where it is made. The 17 mm cover is the only part of the pod that touches the panel; a fresh one puts the seal back without touching pump or valves.
• Pods sit at the right height. Thickness is a machining reference as much as a seal figure, so a 17 mm cover keeps the panel where the program expects it.
• Leaks become visible early. Cream rubber discolours at the zone that is failing, which is a cheaper warning than a scrapped panel.
• Cheap against a scrapped part. A 120 x 85 mm rubber cover costs a fraction of the panel it holds, and of the pump that gets blamed first.
• Ordered to the table, not to a guess. Counting pods per machine keeps the quantity right when a whole table is re-covered.
• Fit checked before ordering. Send measured length, width and thickness, and the cover is matched against your block.
• Consumable, not a project. Covers are the cheapest item in the vacuum assembly, so a set on the shelf is a better use of money than a spare pump.

Check the three numbers on the old cover: 120 mm long, 85 mm wide, 17 mm thick. If they match, it seats in the same place. Send the block or machine model if you want it confirmed first.

The cover sets how far the panel sits above the block. At 17 mm the cover compresses enough to seal and still holds the panel at the working height; a thinner cover changes that height.

Look for the zone where the cream rubber has discoloured or taken a set. A leak is local, so one end of one cover usually looks different from the rest.

No. This is the rubber sealing cover only; the Biesse vacuum blocks and pods are separate items.

Rubber, supplied in cream.

One cover per vacuum block. Count the blocks on the machine table so a full re-cover is one order.

It is listed for Biesse CNC machines. On another table, measure the old cover and compare against 120 x 85 x 17 mm before ordering.

Measured length, width and thickness, the number of pods per machine, and the machine model.