The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-40 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, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-40 is a double-acting, single-rod pneumatic cylinder with a 40 mm rear adjusting screw, letting you fine-tune the stroke end position on the fly without swapping the unit. Its 80 mm bore delivers 2513 N of push force at 0.5 MPa, making it a solid choice for medium-duty clamping, pressing, and positioning tasks where the final stop point needs field adjustment.
A 25 mm diameter piston rod and PT3/8 ports supply ample flow for speeds up to 800 mm/s, while the 28 mm air cushion at each end quietly decelerates the piston. The SCJ body is a tie-rod design, measuring 239 mm in base length (A dimension), which is slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 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. |
| ×75 | 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 adjustment screw allows technicians to quickly dial in the exact stroke end position during machine commissioning, eliminating the need to fabricate shims or external hard stops.
On a packaging line, the adjustable stroke lets operators fine-tune the pusher stroke for different box sizes in seconds, minimizing downtime between production runs.
In clamping fixtures, the stroke can be incrementally extended over time to compensate for pad wear, maintaining consistent clamping force without replacing the cylinder.
Step up to a 100 mm bore (3927 N push at 0.5 MPa) if you need more force, or drop to 63 mm (1559 N push at 0.5 MPa) for a lighter, more compact actuator. The SCJ is the right pick when you need to dial in a precise end stop during commissioning or changeovers; if your stroke is fixed and never changes, a standard SC fixed-stroke cylinder is simpler and more cost-effective. For a drop-in replacement, match an AirTAC SCJ with an 80 mm bore, 75 mm nominal stroke, a 40 mm adjustment range, PT ports, and basic mounting. Should you later need position sensing, the -S magnet option allows CMSG/DMSG sensors to be clamped directly to the tie-rods.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N. Because this is a single-rod cylinder, the push force is always greater than the pull force due to the area of the 25 mm rod.
No. The SCJ80X75-40 does not have a locking mechanism. The air cushion decelerates the piston at the end of stroke, and the adjusting screw only sets the stroke end position. If the load must be held without live air pressure, you will need an external rod lock, a mechanical brake, or a pilot-operated check valve in the circuit.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.