The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X250-10 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 SCJ80X250-10 is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 10 mm of stroke-end reduction, letting you dial in the precise stopping position during commissioning or changeover without replacing the cylinder or adding external hard stops. At 0.5 MPa, it delivers 2513 N of push force and 2268 N on the pull stroke, driven through a 25 mm diameter piston rod.
This tie-rod cylinder uses PT3/8 ports and features an adjustable air cushion with a 28 mm cushion length to decelerate the piston smoothly. The SCJ body length A is 239 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism. It operates on 40 µm filtered air from 0.15 to 1.0 MPa and handles speeds of 30-800 mm/s, making it a robust workhorse for medium-force industrial automation tasks.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X250-10 |
|---|---|
| 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 setup, the 10 mm adjusting screw lets technicians fine-tune the cylinder's extend stop to align with tooling or fixtures, compensating for stack-up tolerances without machining custom spacers.
On packaging lines that switch between product sizes, operators can quickly adjust the stroke end to match a new box height or pallet position, reducing downtime between batches.
In clamping or pressing operations where tooling surfaces wear over time, the adjustable stroke allows the end position to be extended slightly to maintain consistent contact force without replacing the cylinder.
Choose the SCJ80X250-10 when you need a 250 mm nominal stroke with the ability to trim the end position by up to 10 mm on the machine. If your force requirement is lower, stepping down to the 63 mm bore reduces push force to 1559 N at 0.5 MPa; for heavier loads, the 100 mm bore provides 3927 N. Because this is a single-rod cylinder, ensure the 25 mm rod is adequately supported if the stroke is fully extended under side load—consider an external guide rail or switch to a guided cylinder if the load is not purely axial.
For a direct replacement, match an AirTAC SCJ80X250-10 with PT ports and basic mounting. If you need position sensing, the -S magnet option allows CMSG/DMSG sensors to clamp onto the barrel. The adjustable-stroke design eliminates the need for external stop blocks, but if your application requires a fixed, repeatable stroke with no field adjustment, the standard SC80X250 is the simpler alternative.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N (the pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N.
Yes, if you need the adjustable stroke feature. The SCJ80X250-10 has the same bore, nominal stroke, and port size (PT3/8) as the SC80X250, but the body is slightly longer (239 mm A-length) to house the rear adjusting screw. Ensure the extra length fits your mounting envelope and that you do not require the fixed, non-adjustable end position of the standard SC.
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