The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X350-30S 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, 350mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X350-30S delivers a robust 2513 N of push force at 0.5 MPa, making it a capable workhorse for mid-range pneumatic applications. Its defining feature is the rear-cap adjusting screw, which provides a 30 mm field-adjustable stroke range, allowing operators to fine-tune the piston end position without removing the cylinder from the machine.
This double-acting, single-rod cylinder features a 25 mm diameter piston rod and PT3/8 ports. The built-in magnet (denoted by the 'S' suffix) allows for direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for precise end-of-stroke or mid-stroke position feedback. Its 28 mm air cushion at each end ensures smooth, high-speed deceleration.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X350-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 350 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. |
| ×350 | 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 30mm adjustable stroke is ideal for integrators during machine commissioning, allowing the precise end-stop to be dialed in after installation to perfectly match the tooling or workpiece interface.
On a packaging line, the stroke can be quickly adjusted to accommodate a new box or product format without the downtime and cost of swapping out the cylinder for one with a different fixed stroke.
In clamping or pressing applications, the adjusting screw can be used to take up mechanical slack or compensate for wear on contact surfaces over time, maintaining consistent clamping force without reprogramming.
Choose the SCJ80X350-30S when your application requires a substantial force output with the flexibility of on-machine stroke adjustment. If you need more force, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa. For applications where the stroke is fixed and will never need adjustment, the standard SC80X350 fixed-stroke cylinder is a more economical choice.
For this 350 mm stroke length, be mindful of side-loading which can cause rod bending and premature seal wear. If the load is not guided externally, consider using an external guide rail or switching to a guided cylinder assembly. As a direct replacement, match this model with another AirTAC SCJ80X350-30S with a magnet, PT ports, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa operating pressure, the cylinder generates 2513 N of push force and 2268 N of pull force. The push force is higher because the single piston rod reduces the effective piston area on the return stroke. The maximum push force at 0.9 MPa is 4523 N.
A screw on the rear cap mechanically limits how far the piston can extend, shortening the stroke end by up to 30 mm from the nominal 350 mm. This is a stroke-end adjustment only; it does not lock the piston in place. If air pressure is lost, the cylinder will not hold its position, and an external lock or pilot-operated check valve would be required.
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