The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-40STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø40mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X100-40STC is a double-acting, single-rod pneumatic cylinder with a 40 mm adjustable stroke range, letting you fine-tune the stroke end position from 60 mm up to the nominal 100 mm maximum. Its 16 mm diameter piston rod and PT1/4 port deliver a push force of 628 N at 0.5 MPa, making it a compact yet capable actuator for light-to-medium automation tasks.
This model includes a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and the TC centre trunnion mount (supplied with TCM1 bracket, order code F-SC40TC) allows the cylinder to pivot, ideal for swinging or articulating loads. The adjustable rear screw simplifies commissioning and format changes without swapping the cylinder.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-40STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 40 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. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40 mm adjustment range allows engineers to dial in the exact stroke end position during machine commissioning, eliminating the need for custom spacers or hard stops.
Quickly adapt the stroke for different product sizes on a packaging or sorting line by simply turning the rear adjusting screw, reducing downtime between batches.
In clamping or pressing fixtures, the adjustable stroke can be extended to compensate for tooling or pad wear over time, maintaining consistent clamping force without replacing parts.
Choose the SCJ40X100-40STC when you need a 40 mm bore with field-adjustable stroke and a pivoting mount. If more force is required, step up to the 50 mm bore SCJ series, which provides 982 N of push force at the same 0.5 MPa pressure. For a fixed-stroke application where adjustment is not needed, the standard SC40X100 cylinder is a simpler, more cost-effective alternative. This SCJ model is a direct replacement for any AirTAC SCJ40X100-40 cylinder with a TC mount, magnet sensor, and PT ports.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this cylinder provides a push force of 628 N. The pull force is lower at 528 N due to the area of the 16 mm piston rod. The maximum push force at 0.9 MPa is 1130 N.
A screw in the rear cap sets the retracted end position of the piston. By turning the screw, you can shorten the stroke by up to 40 mm from its nominal 100 mm maximum. It adjusts the stroke end stop, not the cylinder's speed or output force.
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