The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X60-50S 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. Ø40mm bore, 60mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X60-50S is a 40 mm bore double-acting, single-rod tie-rod cylinder with a rear adjusting screw that provides a 50 mm field-adjustable stroke-end range. At 0.5 MPa, it delivers 628 N of push force and 528 N of pull force, making it a capable mid-range actuator for tasks that need precise end-position tuning without swapping the cylinder. The 16 mm diameter piston rod and PT1/4 ports keep flow rates practical for standard pneumatic circuits.
A built-in magnet (the -S suffix) allows CMSG, DMSG, or EMSG reed and solid-state sensors to clamp directly onto the barrel for non-contact position sensing. The body length A(SCJ) is 185 mm, and the adjustable cushion helps decelerate the piston smoothly. This model is well-suited to commissioning trials, format changeovers, or any application where the stroke end must be dialled in on the machine.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X60-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 60 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm. |
| ×60 | 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.
The 50 mm adjust range lets technicians fine-tune the stroke end during machine commissioning without removing the cylinder, speeding up the installation of packaging or assembly stations.
On a multi-product conveyor line, the rear screw quickly adjusts the pusher stroke for different box sizes, eliminating the need to stock multiple fixed-stroke cylinders.
In clamping or pressing fixtures, the adjustable stroke end compensates for tooling wear over time, maintaining consistent contact pressure without reprogramming the machine.
Step up to the 50 mm bore SCJ50 series if you need more force—the SCJ50 delivers 982 N push at 0.5 MPa. If your application does not require field-adjustable stroke, the fixed-stroke SC40 series offers a simpler, more compact alternative. For guided loads, consider pairing this cylinder with an external guide or switching to a guided cylinder to handle off-axis forces.
As a direct replacement, match an SCJ40 with the same 60 mm nominal stroke, 50 mm adjust range, PT port thread, and built-in magnet. The basic mounting configuration uses no additional bracket, but FA front flange or LB foot mounts are available if needed. For strokes of 300 mm or more, evaluate side-load and rod bending; an external guide rail or guided cylinder is recommended to protect the rod and bearing.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1280 N. The pull force is lower due to the 16 mm rod area.
A rear-cap adjusting screw sets the stroke end position within a 50 mm range; the nominal 60 mm stroke is the maximum. Choose SCJ when you need to fine-tune the stroke on the machine for setup, changeover, or wear compensation. Pick the fixed-stroke SC series when the stroke is a fixed, known value and you want a simpler, slightly shorter cylinder.
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