The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X80-50SH 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, 80mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X80-50SH is an 80 mm bore double-acting single-rod pneumatic cylinder with a 50 mm field-adjustable stroke range, letting you fine-tune the stroke end position without swapping the cylinder. Its 25 mm rod diameter and PT3/8 ports deliver a substantial 2513 N push force at 0.5 MPa, scaling up to 4523 N at 0.9 MPa for demanding clamp and positioning tasks.
This variant is factory-equipped with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and high-temperature Viton (FKM) seals (-H) rated for 0 to +150 °C. The body length A(SCJ) is 239 mm, and the adjustable air cushion decelerates the piston smoothly over the last 28 mm of travel.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X80-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 80 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. |
| ×80 | 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.
Adjust the stroke end by up to 50 mm to accommodate different workpiece thicknesses on a single fixture, eliminating manual shim changes and reducing changeover time.
The Viton seals allow this cylinder to operate as a part stopper in ovens or heated assembly lines up to 150 °C, with the adjustable screw setting the precise stopping position.
During machine setup, the 50 mm adjustment range lets technicians quickly dial in the optimal actuator stroke end without needing to stock multiple fixed-stroke cylinders.
Choose the SCJ80X80-50SH when you need to dial in the stroke end precisely during commissioning or format changes on an 80 mm bore platform. If your force requirement is lower, stepping down to the 63 mm bore reduces push force to 1559 N at 0.5 MPa; for heavier loads, the 100 mm bore delivers 3927 N. The 50 mm adjustment range is ideal for applications needing substantial end-stop variation without external hard stops.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with an 80 mm bore, 80 mm nominal stroke, 50 mm adjust range, PT ports, basic mounting, magnet, and Viton seals. If your application does not require stroke adjustability, a fixed-stroke SC80X80 cylinder is a simpler alternative. For strokes of 300 mm or more, evaluate side-loading and rod bending; an external guide or guided cylinder may be necessary.
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. The pull force is lower because the single rod reduces the piston area on the return stroke.
Yes, if you need the ability to fine-tune the stroke end. The SCJ80X80-50SH shares the same 80 mm bore and 80 mm nominal stroke as an SC80X80, but adds a rear adjusting screw with a 50 mm range. Ensure your mounting and porting match, and note the SCJ body is slightly longer to accommodate the adjusting mechanism.
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