The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X150-50TC 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, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X150-50TC is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly into the rear cap. Its 50 mm adjusting screw lets you dial in the exact end position on the fly, making it a practical choice for commissioning runs or format changes where a fixed 150 mm stroke would be too rigid. With a 16 mm diameter piston rod and PT1/4 ports, it delivers a useful 628 N of push force at a standard 0.5 MPa supply.
This model is configured with a TC centre trunnion mount, which ships with the TCM1 bracket and allows the cylinder to pivot as it strokes—ideal for swinging gates, clamps, or any guided linkage. The body length A(SCJ) is 185 mm, and the air cushion is 21 mm long to softly decelerate the piston. At its maximum 0.9 MPa operating pressure, the push force climbs to 1130 N.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X150-50TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 150 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. |
| ×150 | 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 adjustment range lets technicians fine-tune the stroke end-stop during initial machine setup without swapping out the cylinder, saving hours of mechanical work.
Quickly adapt a diverter or stop gate to handle different product sizes on a packaging line by adjusting the screw, rather than reprogramming a servo axis.
In clamping or pressing fixtures, the adjustable stroke can take up for tooling wear or material thickness variation, maintaining consistent contact force over time.
Step up to a 50 mm bore if your application needs more muscle; the SCJ50 delivers 982 N of push at 0.5 MPa. For a simpler, fixed-stroke setup without the rear adjuster, the standard SC series is a direct alternative. This 150 mm stroke is well within the 1200 mm maximum for a 40 mm bore, so it is a standard catalogue item. To replace this exact model, match the 40 mm bore, 150 mm nominal stroke, 50 mm adjust range, PT port thread, and the TC mounting style (F-SC40TC). If side loads are a concern at this mid-range stroke, consider adding an external guide rail or switching to a guided cylinder to protect the rod and bearing from bending moments.
Adjustable-stroke checklist
At 0.5 MPa, it generates 628 N pushing and 528 N pulling (due to the 16 mm rod area). The force increases linearly with pressure, reaching 1130 N push at the maximum operating pressure of 0.9 MPa.
The TC code means the cylinder comes with a centre trunnion pivot and the TCM1 mounting bracket. This allows the entire cylinder body to swing, which is essential for applications where the rod end travels in an arc. It uses the F-SC40TC mounting kit.
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