The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X250-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø80mm bore, 250mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X250-10S is a double-acting, single-rod pneumatic cylinder that puts 2513 N of push force at 0.5 MPa into a 250 mm nominal stroke, with a rear-cap adjusting screw providing up to 10 mm of field-tuneable stroke-end reduction. Its 25 mm piston rod and PT3/8 ports handle 0.15–1.0 MPa working pressure, and the built-in magnet lets CMSG/DMSG/EMSG sensors clamp directly onto the tie-rod barrel for clean position feedback.
Because the stroke end is adjustable without dismounting the cylinder, commissioning teams can dial in the exact stop position on the machine. The 28 mm air cushion decelerates the piston smoothly, and the tie-rod construction keeps the body length A(SCJ) at 239 mm for straightforward mounting in space-constrained stations.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X250-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -10 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
During machine bring-up, technicians adjust the rear screw to set the exact end-of-stroke position for a clamp or stop, eliminating the need to swap cylinders or fabricate shims.
On a packaging line, the 10 mm adjustment range allows operators to take up mechanical wear on a product stop without changing the cylinder, keeping cycle timing consistent.
When a machine switches between product sizes, the stroke end is quickly re-set via the adjusting screw, and the built-in magnet confirms the new position through a barrel-mounted sensor.
Choose the SCJ80X250-10S when you need a 250 mm nominal stroke that can be shortened by up to 10 mm at the rear screw—ideal for format changeovers or wear take-up on medium-duty tooling. If the 2513 N push at 0.5 MPa is too light, stepping up to the SCJ100 bore delivers 3927 N; if it is more force than needed, the SCJ63 bore offers 1559 N. For applications where the stroke must never be altered after setup, the fixed-stroke SC80X250 is a simpler, lower-cost alternative. At 250 mm stroke, rod bending is rarely a concern under axial loads, but if the cylinder sees significant side force, add an external guide rail or switch to a guided cylinder. A direct replacement must match the SCJ80 bore, 250 mm nominal stroke, 10 mm adjust range, PT3/8 ports, basic mounting, and the -S magnet option.
Adjustable-stroke checklist
At 0.5 MPa air pressure, the cylinder delivers 2513 N of push force and 2268 N of pull force. The pull force is lower because the 25 mm piston rod reduces the effective piston area on the retract side. At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 5026 N.
Yes, provided the original unit is an SCJ80 adjustable-stroke cylinder with a 250 mm nominal stroke, a 10 mm adjustment range, PT3/8 ports, basic mounting, and a magnet. The SCJ series is a tie-rod design, so mounting hole patterns match other SCJ80 cylinders of the same configuration.
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