The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X225-75S 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. Ø80mm bore, 225mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X225-75S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, providing a nominal 225 mm maximum stroke that can be finely shortened by up to 75 mm using the rear-cap adjusting screw. This 80 mm bore unit delivers a substantial 2513 N of push force at 0.5 MPa, making it a robust choice for applications requiring precise end-position tuning during setup or changeovers. The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
With a 25 mm diameter piston rod and PT3/8 ports, this tie-rod cylinder is designed for flexible integration. The adjustable screw sets the stroke end position, not the force, allowing operators to compensate for tooling wear or adapt to different product formats without replacing the cylinder. The body length (A dimension) is 239 mm, and the unit features a 28 mm air cushion for smooth deceleration. It operates on filtered air from 0.15 to 1.0 MPa.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X225-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 75 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. |
| ×225 | 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.
The 75 mm adjustment range allows engineers to precisely dial in the stroke end position during machine commissioning without swapping cylinders or machining external stops, saving significant setup time.
Ideal for packaging or sorting lines where the push-off or divert distance must be quickly changed for different box sizes. The rear screw makes mechanical stroke changes a fast, tool-free operation.
In pressing or clamping fixtures, the adjustable stroke can be extended over time to compensate for pad or tooling wear, maintaining consistent clamping force and position without replacing the entire actuator.
Choose the SCJ80X225-75S when you need a powerful, field-tunable actuator. For a step down in force, the 63 mm bore SCJ offers 1559 N of push at 0.5 MPa; for significantly higher force, the 100 mm bore version provides 3927 N. If your application does not require stroke adjustability, a fixed-stroke SC80X225 cylinder is a simpler, more compact alternative. For applications with high side loads on the extended 225 mm stroke, consider an external guide rail or a guided cylinder to prevent rod bending.
As a direct replacement, match this model with another AirTAC SCJ adjustable-stroke cylinder of 80 mm bore, 225 mm nominal stroke, a 75 mm adjustment range, PT ports, and a built-in magnet. The basic mounting style uses the cylinder's own body for installation, but FA, LB, or TC mounting accessories from the SCJ subset can be added if needed.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. Because it is a single-rod cylinder, the push force is greater than the pull force. At the maximum operating pressure of 0.9 MPa, the push force reaches 4523 N.
A rear-cap adjusting screw sets the mechanical end-stop for the piston, allowing you to shorten the effective stroke by up to 75 mm from its 225 mm nominal maximum. Choose an SCJ when you need to fine-tune the stroke end on the machine for different tasks or to take up mechanical play. If the stroke length is fixed and never changes, the standard SC series is the more cost-effective choice.
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