140x78x5mm Sealing Gasket for SCM Vacuum Suction Cup CNC Machine Spares

A vacuum cup that will not hold a panel is usually a torn gasket, not a dead pump. This sealing gasket for SCM vacuum suction blocks measures 140 mm long, 78 mm wide and 5 mm thick, and it is a straight swap for the worn seal on SCM woodworking CNC machines. It is supplied in yellow or black. Measure the gasket you take off, match the three numbers, and the cup grips again. Quote is by size and colour.

A vacuum cup that has stopped holding a panel shows the same three things: the workpiece creeps during routing, the pump runs hot pulling shop air through a split seal, and the machine sits idle while somebody hunts for a spare. This gasket clears all three.

It is the sealing cover between the vacuum suction block and the workpiece on SCM woodworking CNC machines. The 140 mm length, 78 mm width and 5 mm thickness are the working dimensions of the seat, so it compresses over its whole footprint instead of standing proud at one corner. Even compression is what stops vacuum escaping sideways from under the block.

Gaskets are supplied in yellow or black, so a spare matches the colour already on the machine and a colour-coded kit stays readable at the cup. The flat profile keeps the stack at 5 mm, the same seat the worn part came out of.

The part belongs to the SCM spare parts range and is used where SCM suction blocks clamp panels for routing, drilling, engraving and profiling. It is a wear item: replace it when the cup stops holding, keep one per block on the shelf, and the machine stays in cut instead of waiting on a shipment.

What the part is, in the numbers that decide whether it fits.

• Seat size — 140 mm long, 78 mm wide, 5 mm thick; the three figures are the load-bearing specification on this part.
• Sealing cover — it is the seal between the vacuum suction block and the panel on SCM woodworking CNC machines.
• Vacuum block seal — the part is listed under that name in SCM parts lookups, next to the suction cup rather than the pump.
• Two colours — yellow or black, chosen at order, so a spare matches the gasket already on the machine.
• Flat profile — 5 mm of section, so the cup returns to its original working height on the panel.
• Full-face contact — the 140 x 78 mm outline compresses across the whole seat, not just along the lip.
• SCM fitment — made for SCM suction blocks and sold as an SCM spare part, not as a universal blank to be cut down.
• One wear item, one line — a single part number to order, so a block is never rebuilt because one gasket failed.
• Workshop stock item — small, flat and light enough to keep a set on the shelf and swap during a normal stoppage.

The choice on a leaking cup is always the same two bad options: keep running and scrap panels, or stop the machine and wait for a part. Neither is necessary.

• You stop scrapping panels. A seal that leaks lets the panel creep under the cutter; a 140x78x5mm gasket restores the hold for the cost of a wear item, not a cup assembly.
• You stop paying for pump wear. Air pulled through a split gasket makes the pump run continuously. Closing that leak puts the pump back on its normal duty cycle.
• You keep the changeover in minutes. The gasket is the removable part of the cup, so the block, the body and the fittings all stay on the machine.
• You fit by number, not by guess. 140 mm, 78 mm, 5 mm — measure the old gasket, match three figures, order once.
• You can colour-code the shop. Yellow and black let a maintenance team mark which blocks were re-sealed and when.
• You stock one part, not a kit. One size covers the SCM suction block position, so the shelf holds a spare seal instead of a spare cup.
• You buy from the same range. It ships as an SCM spare part alongside vacuum pods, chain pads and lip gaskets for the same machines.

SCM woodworking CNC machines that use vacuum suction blocks. The part is the sealing cover between the block and the panel, and it is supplied as an SCM spare. Check the cup on your machine against the 140x78x5mm size before ordering.

140 mm long, 78 mm wide and 5 mm thick. Length and width are the outline of the seat; 5 mm is the compressed section that sets the cup height.

Take the old gasket off and measure it. If it reads 140 mm by 78 mm by 5 mm, this is the replacement. Measuring the worn part is more reliable than measuring the aluminium block, because the seat edge is what the gasket has to match.

No. Only the gasket is replaced. The vacuum block, cup body and fittings stay on the machine, which is why a leaking seal is a small maintenance job rather than a rebuild.

Yellow or black, whichever you specify on the order. Both are the same 140x78x5mm part; the colour is a workshop identification aid, not a different specification.

When the cup stops holding a panel, not on a fixed calendar interval. A seal that lets the workpiece move under the cutter has already failed, and continuing to run costs panels and pump hours.

Yes. Vacuum block seal, suction cup gasket and SCM sealing gasket all describe this 140x78x5mm seal. SCM parts lookups list it as a seal for the suction block; the names differ, the seat size does not.

Contact us for a quote. Pricing is quoted on the size and the colour you need, and the quote is the confirmed figure before anything ships.