The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X100-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø80mm bore, 100mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X100-40S is an 80 mm bore double-acting single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap screw lets you shorten the stroke end by up to 40 mm without removing the cylinder, giving commissioning technicians and maintenance teams a fast way to dial in the exact end position for format changes or wear take-up. The built-in magnet (-S suffix) allows CMSG/DMSG/EMSG solid-state and reed sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection.
At 0.5 MPa air pressure this cylinder delivers 2513 N of push force and 2268 N on the pull stroke, suiting medium-to-heavy clamping, pressing and positioning tasks. The 25 mm piston rod, PT3/8 ports and 28 mm air cushion combine with a body length A of 239 mm to fit into guarded machinery where the stroke must be fine-tuned after installation. Operating pressure spans 0.15–1.0 MPa with a 1.5 MPa proof pressure, and the standard TPU seal works from -20 to +70 °C.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X100-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 40 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. |
| -40 | 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 40 mm rear adjustment lets a packaging line operator quickly change the end-stop position when switching between box sizes, eliminating mechanical stop rework and reducing changeover downtime.
With 2513 N of push force and a built-in magnet for CMSG/DMSG sensors, this cylinder suits automated welding or assembly fixtures where the controller must confirm the clamp has reached its adjusted end position.
During machine commissioning the 40 mm screw lets integrators fine-tune the stroke end under live conditions. Later, maintenance teams can advance the screw to compensate for gripper pad wear without replacing the cylinder.
Choose the SCJ80 bore when your application needs around 2500 N of push force at typical shop air; if you can drop to roughly 1560 N the 63 mm bore (SCJ63) saves space and weight, while stepping up to the 100 mm bore (SCJ100) provides 3927 N push at the same 0.5 MPa. The 40 mm adjustable range is generous for commissioning trials and multi-product lines—if you only need a fixed stroke the SC80 series eliminates the rear screw and shortens the body slightly. For strokes of 300 mm or longer on this 80 mm bore, consider an external guide rail or a guided cylinder to protect the 25 mm rod from side-load bending.
When it is time to replace this unit, match the bore (80 mm), nominal stroke (100 mm), adjust range (-40), PT port thread, basic mounting and the -S magnet option with another AirTAC SCJ80X100-40S. The built-in magnet is essential if your control system relies on barrel-mounted sensors; omitting it means switching to external limit switches or bracket-mounted sensors.
Adjustable-stroke checklist
At 0.5 MPa the push force is 2513 N and pull force is 2268 N; at the maximum operating pressure of 0.9 MPa push reaches 4523 N. The rear adjusting screw only sets the stroke end position within the 40 mm range—it does not alter the bore area, rod diameter or output force.
Mechanically the tie-rod body, 25 mm rod, PT3/8 ports and mounting accessories (FA, LB, TC) are shared, but the SCJ body is slightly longer to house the adjusting screw. You must confirm there is clearance behind the rear cap for the screw and that your stroke setting does not exceed the machine's mechanical limits. The -S magnet must also match your sensor setup.
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