The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X800-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø80mm bore, 800mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X800-100 is an 80 mm bore double-acting single-rod cylinder with a field-adjustable stroke end. A rear-cap screw lets you shorten the effective stroke by up to 100 mm without dismounting the cylinder, making it ideal for commissioning trials, format changeovers, and wear take-up on long-stroke tooling. At 0.5 MPa it delivers 2513 N push and 2268 N pull, with a 25 mm rod and PT3/8 ports.
Its 800 mm nominal stroke is well within the 1500 mm maximum for this bore. The tie-rod body measures 239 mm long (A dimension) plus stroke, and the adjustable air cushion decelerates the piston smoothly at stroke end. The screw sets only the stroke end position—it is not a force or speed control. If the load must hold without live air pressure, an external rod lock or pilot-operated check valve is required.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X800-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 800 mm |
| Stroke adjustment | Up to 100 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. |
| ×800 | Nominal (maximum) stroke length in mm. |
| -100 | 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.
The 100 mm rear screw adjustment lets operators dial in the exact stroke end position on a packaging machine's pusher arm, compensating for product thickness variation without swapping the cylinder.
With 800 mm of nominal stroke and 2513 N of push force, this cylinder moves heavy pallets or sheets across a roller conveyor. The adjustable stroke end prevents over-travel when line speed changes.
During machine commissioning, the stroke can be shortened incrementally from the rear cap to find the optimal end position. Later, the same screw takes up mechanical wear in the tooling without downtime.
Choose this 80 mm bore when the 63 mm model's 1559 N push at 0.5 MPa is marginal. If 2513 N is more than needed, the 63 mm SCJ63X800-100 saves space and air. For purely fixed-stroke applications, a standard SC80X800 eliminates the adjuster and is slightly shorter overall. If side load or rod bending is a concern at 800 mm stroke, add an external guide rail or switch to a guided cylinder; the 25 mm rod can deflect under high side forces. A direct replacement must match the 80 mm bore, 800 mm nominal stroke, 100 mm adjust range, PT ports, basic mounting, and no magnet.
Adjustable-stroke checklist
At 0.5 MPa, push force is 2513 N and pull force is 2268 N (the difference is due to the single 25 mm rod). At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The theoretical maximum at 1.0 MPa is 513 kgf.
A rear-cap adjusting screw limits the piston's stroke end by up to 100 mm. You set the nominal 800 mm stroke as the maximum, then shorten it on the machine. It replaces an SC80X800 directly only if you need the field-adjustment feature; the SCJ body is slightly longer due to the screw mechanism. Mounting, port, and magnet options must match.
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