The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X100-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 100mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X100-20 is an 80 mm bore double-acting single-rod pneumatic cylinder with a field-adjustable stroke end, letting you dial the retract position back by up to 20 mm without removing the unit. It delivers a push force of 2513 N at 0.5 MPa and 4523 N at the 0.9 MPa maximum operating pressure, making it a solid choice for medium-duty clamping, pressing, and positioning tasks where fine mechanical adjustment speeds up commissioning.
A rear-cap adjusting screw sets the stroke end within the 20 mm range, while the 25 mm diameter piston rod and PT3/8 ports handle flow for speeds of 30-800 mm/s. The tie-rod body length A(SCJ) is 239 mm, and the 28 mm air cushion at each end decelerates the piston quietly. This basic-configuration model uses a TPU seal for standard -20 to +70 °C operation and PT threads.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X100-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 20 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. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
On packaging or filling lines, operators tweak the rear screw to shift the retract end stop by up to 20 mm when switching between product sizes, eliminating the need to swap cylinders or fabricate new hard stops.
In woodworking or welding fixtures, the 20 mm adjustment compensates for pad wear or material thickness variation over time, maintaining consistent clamp force without reprogramming the machine.
During machine bring-up, engineers can fine-tune the 100 mm stroke end point in seconds with a wrench, quickly dialling in the optimal actuator position before locking the setting for production.
Step up to the 100 mm bore SCJ100X100-20 if your application needs the next force class—3927 N push at 0.5 MPa—while keeping the same 20 mm adjustment range. If you do not need field-adjustable stroke, the fixed-stroke SC80X100 is a simpler, slightly shorter alternative. For swinging loads, choose the TC centre-trunnion mounting option (F-SC80TC with TCM1 bracket) instead of basic foot mounting.
When replacing an existing unit, match the 80 mm bore, 100 mm nominal stroke, 20 mm adjust range, PT3/8 port thread, and basic mounting. If the cylinder must hold a static load without live air pressure, add an external rod lock or pilot-operated check valve—the air cushion and adjusting screw do not lock the piston.
Adjustable-stroke checklist
At 0.5 MPa the cylinder delivers 2513 N pushing and 2268 N pulling. The maximum push force at the 0.9 MPa operating limit is 4523 N. Because it is a single-rod design, push force is always higher than pull force due to the 25 mm rod area.
Yes, provided the mounting style and port thread match. The SCJ80X100-20 has the same 80 mm bore and 100 mm nominal stroke but adds a rear adjusting screw that shortens the stroke end by up to 20 mm. The body length A(SCJ) is 239 mm, slightly longer than the fixed-stroke SC version, so check clearance at the rear cap.
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