The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X120-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø80mm bore, 120mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X120-100 is an 80 mm bore double-acting, single-rod cylinder that provides a field-adjustable stroke end via a rear-cap screw, allowing the effective stroke to be shortened by up to 100 mm from its 120 mm nominal maximum. This adjustment range is ideal for commissioning fine-tuning and format changeovers, delivering a push force of 2513 N at 0.5 MPa and up to 4523 N at the maximum operating pressure of 0.9 MPa.
With a 25 mm diameter piston rod, PT3/8 ports, and an M20x1.5 rod thread, this tie-rod cylinder is built for robust industrial use. The body length A for this SCJ model is 239 mm, and it features an adjustable pneumatic cushion of 28 mm to decelerate the piston smoothly at the stroke end.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X120-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 120 mm |
| Stroke adjustment | Up to 100 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| 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, 28 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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. |
|---|---|
| 80 | Bore size in mm. |
| ×120 | Nominal (maximum) stroke length in mm. |
| -100 | 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 100 mm adjustment range lets technicians dial in the exact stroke end position during initial machine setup, accommodating stack-up tolerances without needing to fabricate custom stops or shims.
Quickly adapt the cylinder's stroke for different product sizes on packaging or material handling lines. The rear screw adjustment is far faster than unbolting and replacing a fixed-stroke cylinder.
In clamping or pressing operations, the adjustable stroke end can be used to compensate for tooling wear over time, maintaining consistent clamp force and position without reprogramming a servo axis.
Select the SCJ80X120-100 when you need to fine-tune the stroke end position on your machine without swapping the cylinder. For applications requiring a higher force class, stepping up to the 100 mm bore provides 3927 N of push force at 0.5 MPa. If a fixed stroke is sufficient, the standard SC80 series offers the same mounting and force characteristics without the rear adjustment mechanism. For a direct replacement, match an AirTAC SCJ cylinder with an 80 mm bore, a nominal stroke of 120 mm, a 100 mm adjustment range, PT3/8 ports, and basic mounting.
Adjustable-stroke checklist
A screw in the rear cap acts as an internal, adjustable end-stop for the piston. Turning the screw changes the stroke end position, allowing you to shorten the effective stroke by up to 100 mm from the 120 mm nominal maximum. It does not change the cylinder's force or speed.
The theoretical push force is 2513 N at 0.5 MPa and 4523 N at the maximum operating pressure of 0.9 MPa. The pull force is slightly lower at 2268 N at 0.5 MPa due to the area of the 25 mm piston rod.
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