The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X90-30 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. Ø80mm bore, 90mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X90-30 is an 80 mm bore double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 30 mm of retraction from the nominal 90 mm stroke, letting you fine-tune the end position without replacing the cylinder or adding external hard stops. With a 25 mm diameter rod and PT3/8 ports, it delivers 2513 N of push force at 0.5 MPa and up to 4523 N at 0.9 MPa.
This tie-rod cylinder uses a 28 mm air cushion for smooth deceleration and operates on 40 µm filtered air from 0.15 to 1.0 MPa. The standard TPU seals suit temperatures from -20 to +70 °C. The body length A(SCJ) is 239 mm, making it a compact solution for machines that need stroke-end adjustability during commissioning or format changeovers.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X90-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 90 mm |
| Stroke adjustment | Up to 30 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. |
| ×90 | 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.
The 30 mm adjustment screw allows engineers to dial in the exact stroke end position during machine commissioning, compensating for stack-up tolerances without machining custom spacers.
On packaging or assembly lines, the stroke can be quickly re-set to accommodate different product sizes, reducing changeover time on multi-format machines.
In clamping or pressing fixtures, the adjustable stroke end can be periodically advanced to compensate for tooling or pad wear, maintaining consistent clamping force over time.
Choose the SCJ80X90-30 when your application requires a robust 80 mm bore with the flexibility to trim the stroke end by up to 30 mm. If you need more force, the 100 mm bore SCJ100 series provides 3927 N push at 0.5 MPa. For lower force requirements, the 63 mm bore SCJ63 delivers 1559 N. This model is ideal if you anticipate needing to fine-tune the cylinder's end position after installation. For a fixed, non-adjustable stroke, the standard SC80 series is a simpler alternative. The exact replacement match is another AirTAC SCJ80X90-30 with PT ports and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, it generates 2513 N pushing and 2268 N pulling. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke.
A screw in the rear cap acts as an internal stop for the piston. Turning the screw changes the stroke end position within a 30 mm range, shortening the nominal 90 mm stroke. It adjusts the end position only and does not alter the cylinder's force, speed, or the forward stroke start point.
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