The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X225-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 225mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X225-50S is an 80 mm bore double-acting cylinder with a single rod and a field-adjustable stroke end. A rear-cap adjusting screw lets you shorten the effective stroke by up to 50 mm without removing the cylinder, making it ideal for commissioning trials and format changeovers. With a 25 mm rod, PT3/8 ports, and a 28 mm air cushion, it delivers 2513 N of push force at 0.5 MPa.
This model includes a built-in magnet, so CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing. The adjustable screw sets only the stroke end position—it does not alter the cylinder's force rating or speed. For applications where the load must be held without live air pressure, an external rod lock or pilot-operated check valve is required.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X225-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 50 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. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
Fine-tune the end position of a stop gate or pusher during line commissioning. The 50 mm screw adjustment allows operators to dial in the exact stroke without swapping cylinders or machining custom stops.
Quickly adapt a diverter or reject station to handle different box sizes. The adjustable stroke lets a single actuator cover multiple product formats, reducing changeover time on a packaging line.
In clamping or pressing fixtures, use the rear screw to take up mechanical wear on tooling or contact surfaces over time. This maintains consistent clamp force without reprogramming the machine's controller.
Choose the SCJ80 when your application needs around 2513 N of push at standard plant air. If you require more force, the 100 mm bore SCJ100 delivers 3927 N push at 0.5 MPa; for a lighter, more compact solution, the 63 mm bore SCJ63 provides 1559 N. The adjustable stroke is the key differentiator—if your stroke length is fixed and never needs field tuning, a standard SC fixed-stroke cylinder is a more economical choice.
For direct replacement, match the 80 mm bore, 225 mm nominal stroke, 50 mm adjust range, PT ports, and the built-in magnet. This basic-mount cylinder requires the mounting style to be ordered separately from the SCJ subset: FA front flange, LB foot, or TC centre trunnion. At a 225 mm stroke, rod bending is not a primary concern, but for any off-axis loading, an external guide or a guided cylinder is recommended.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The push force is higher because the single rod reduces the piston area on the return side. The maximum operating force at 0.9 MPa is 4523 N push.
Yes, if you need field-adjustable stroke. The SCJ80X225-50S matches the SC80 bore and rod dimensions but adds a rear adjusting screw. Ensure your mounting and port connections (PT3/8) are compatible, and note the SCJ body is slightly longer than a fixed-stroke SC of the same bore.
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.