The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X500-30STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø40mm bore, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X500-30STC delivers 628 N of push force at 0.5 MPa, driven by a 16 mm diameter single rod. Its rear-cap adjusting screw provides a 30 mm stroke-end reduction range, letting you dial in the exact stopping position on the machine without swapping the cylinder or adding external hard stops.
This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors and ships with a TC centre trunnion pivot (F-SC40TC bracket included) for applications where the cylinder body needs to swing. The 40 mm bore body length A(SCJ) is 185 mm, and the adjustable air cushion decelerates the piston smoothly at both ends.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X500-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 500 mm |
| Stroke adjustment | Up to 30 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. |
| ×500 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
Use the 30 mm adjusting screw to precisely set the retract end position during commissioning, eliminating the need for shims or repositioning external stops on packaging machinery.
Quickly adjust the stroke end for different product sizes on a conveyor diverter or label applicator, reducing downtime between batches without any mechanical disassembly.
Compensate for gradual wear on gripper pads or tooling tips by advancing the stroke end slightly via the rear screw, maintaining consistent contact force over the tooling's service life.
Step up to the 50 mm bore if your application demands more than 982 N of push force at 0.5 MPa. For purely fixed-stroke tasks where no field adjustment is ever needed, the standard SC series offers a simpler, slightly shorter body. This SCJ replaces any AirTAC SCJ40X500-30 with matching PT ports and TC mount; ensure the magnet option is present if sensors are already fitted. At 500 mm of nominal stroke, consider an external guide rail or a guided cylinder if the rod sees any significant side load, as the 16 mm rod can deflect under off-axis forces.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it generates 628 N pushing and 528 N pulling. The maximum push force at 0.9 MPa is 1130 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area difference.
Yes. The -S suffix in the code denotes a built-in magnet along the barrel. This allows you to directly clamp AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors onto the tie-rod barrel to detect piston position without any additional mounting brackets.
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