The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X285-30STC 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, 285mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X285-30STC is an 80 mm bore double-acting single-rod cylinder with a field-adjustable stroke end, letting you fine-tune the 285 mm nominal stroke by up to 30 mm without swapping the unit. At 0.5 MPa it delivers 2513 N push and 2268 N pull, and the 25 mm rod and PT3/8 ports handle typical mid-range pneumatic tasks.
This model ships with a built-in magnet (-S) for CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount with the TCM1 bracket, making it ready for pivoting applications. The tie-rod body (A length 239 mm) includes a 28 mm air cushion and operates from 0.15 to 1.0 MPa.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X285-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 285 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. |
| ×285 | 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.
Adjust the stroke end-stop by up to 30 mm in seconds when switching between product sizes on a packaging line, eliminating the need for mechanical shims.
Fine-tune the actuator’s end position during machine build without depressurising or dismounting, speeding up the final alignment process.
Take up mechanical play in linkages or tooling over time by slightly extending the effective stroke, maintaining consistent process quality.
Choose this 80 mm bore when the 63 mm unit’s 1559 N push at 0.5 MPa is marginal; if you need more force, the 100 mm bore provides 3927 N. The 30 mm rear screw adjustment is ideal for commissioning tweaks or wear take-up on a 285 mm stroke. For a fixed stroke without the adjust screw, use the standard SC series.
At this stroke length, rod bending under side load becomes a concern—add an external guide or switch to a guided cylinder if the load is not purely axial. The exact replacement is an AirTAC SCJ80X285-30 with TC mount, magnet, and PT ports.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The pull force is lower because the rod reduces the piston area on the return side.
Yes, this is a direct replacement for any AirTAC SCJ80 with a 285 mm nominal stroke and 30 mm adjust range, provided the old unit also uses a centre trunnion (TC) mount, PT ports, and a magnet sensor. The F-SC80TC trunnion bracket is included.
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