The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X300-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø100mm bore, 300mm nominal stroke, PT1/2 ports and adjustable end cushioning.
The SCJ100X300-75 delivers a substantial 3927 N push force at 0.5 MPa, with a 25 mm rod and PT1/2 ports, making it a workhorse for medium-to-heavy linear tasks. Its 75 mm rear adjusting screw lets you dial in the exact stroke end on the fly—perfect for commissioning or format changes without swapping the cylinder.
With a 29 mm air cushion and a body length of 245 mm, this double-acting, single-rod cylinder handles speeds up to 800 mm/s. At 0.9 MPa, push thrust reaches 7068 N, while pull force is 3681 N, ensuring reliable cycling in clamping, pressing, and positioning applications.
| Model | Airtac SCJ100 Standard Cylinder SCJ100X300-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 75 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. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -75 | 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.
Quickly adjust the end stop by up to 75 mm when switching product sizes on packaging or filling lines, eliminating manual stop repositioning.
Fine-tune the pressing depth in assembly fixtures or glue presses to accommodate part tolerances or tooling wear over time.
Acts as an adjustable hard stop on conveyors for pallets or heavy boxes, allowing operators to set the precise stopping position without tools.
For higher force, step up to the SCJ125 (6136 N push at 0.5 MPa); for a lighter, more compact solution, the SCJ80 offers 2513 N. If your stroke never needs field adjustment, the fixed-stroke SC100X300 reduces complexity. At 300 mm stroke, watch for side loads—consider an external guide rail or a guided cylinder if the rod sees off-axis forces. A direct replacement must match the 100 mm bore, 300 mm nominal stroke, 75 mm adjust range, PT ports, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, it provides 3927 N push and 3681 N pull. Maximum push force at the 1.0 MPa operating limit is 7068 N. The pull force is lower due to the 25 mm single rod area.
The rear screw shortens the stroke end by up to 75 mm from the 300 mm nominal maximum. It is a direct dimensional match for an SC100X300 if you need the same bore, stroke, and PT ports, but adds field-adjustability.
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