The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X35-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø100mm bore, 35mm nominal stroke, PT1/2 ports and adjustable end cushioning.
The SCJ100X35-20 is a double-acting, single-rod pneumatic cylinder that puts 3927 N of push force at 0.5 MPa behind a 25 mm diameter piston rod. Its defining feature is the rear-cap adjusting screw, which lets you shorten the stroke end by up to 20 mm on the fly, making it ideal for commissioning trials where the final stop position is not yet fixed.
With a body length A of 245 mm and a 29 mm air cushion, this cylinder decelerates loads smoothly at the end of travel. The PT1/2 ports and M20x1.5 rod thread connect easily into standard pneumatic circuits, and the tie-rod construction keeps the assembly serviceable in the field.
| Model | Airtac SCJ100 Standard Cylinder SCJ100X35-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 35 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| 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, 29 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 | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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. |
|---|---|
| 100 | Bore size in mm. |
| ×35 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Fine-tune the end position of a clamp or stop during machine installation without swapping cylinders. The 20 mm screw adjustment lets technicians dial in the exact stroke required.
Quickly adjust the push stroke on a packaging diverter or reject station when switching between product sizes. The rear screw eliminates the need for external hard stops.
Take up mechanical play in a pressing or riveting fixture over time. The adjustable stroke end can be advanced slightly to maintain consistent tool engagement as tooling wears.
Choose the SCJ100 when you need the 3927 N push force at 0.5 MPa that a 100 mm bore delivers. If your load is lighter, stepping down to the 80 mm bore saves space and air, but drops push force to 2513 N. For heavier applications, the 125 mm bore provides 6136 N. This adjustable-stroke model is the right pick when the machine's end-stop position needs fine-tuning after installation; if the stroke is fixed and never changes, the standard SC100 fixed-stroke cylinder is a simpler, lower-cost alternative. A direct replacement must match the 100 mm bore, 35 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting style.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N.
You can, provided the 35 mm nominal stroke and 20 mm adjust range suit your application. The SCJ body is slightly longer to house the adjusting screw. Ensure the port size (PT1/2), rod thread (M20x1.5), and mounting style match your existing setup.
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