The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-30S 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, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-30S is an 80 mm bore double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. With a 25 mm diameter piston rod and PT3/8 ports, it delivers a push force of 2513 N at 0.5 MPa and 4523 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for medium-to-heavy industrial tasks where the final stop position needs fine-tuning during commissioning or changeovers.
This model includes a built-in magnet (suffix -S), allowing direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable end-of-stroke detection. The body length A(SCJ) is 239 mm, and the adjustable air cushion provides smooth deceleration over its 28 mm length. As a genuine AirTAC component, it is supplied with TPU seals and PT threads as standard.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 75 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. |
| ×75 | 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 rear screw adjustment lets technicians fine-tune the end stop on the fly during machine commissioning, eliminating the need to shim or swap cylinders to achieve the exact 75 mm nominal stroke position.
On packaging lines, the adjustable stroke allows operators to quickly adapt the cylinder's end position for different box or product sizes, reducing downtime between production runs without any mechanical disassembly.
In pressing or clamping fixtures, the stroke can be incrementally extended via the adjusting screw to compensate for tooling or pad wear over time, maintaining consistent clamping force and position without replacing the actuator.
Choose the SCJ80X75-30S when you need to dial in a precise stroke end position without swapping cylinders; the 30 mm adjustment range is ideal for wear take-up or format changes on packaging and assembly machinery. If 2513 N of push force at 0.5 MPa is insufficient, stepping up to the 100 mm bore SCJ100 series provides 3927 N, while a step down to the 63 mm bore offers 1559 N for lighter, more compact applications. This adjustable-stroke unit is the right choice over a fixed-stroke SC80 when the exact stroke length is not finalized or may vary between production batches.
For direct replacement, match an AirTAC SCJ80 cylinder with an 80 mm bore, 75 mm nominal stroke, 30 mm adjust range, PT ports, basic mounting, and the -S magnet option. If the application involves significant side loads, consider an external guide rail or a guided cylinder, as the single-rod design is optimized for axial thrust. Mounting accessories from the SCJ subset, such as the FA front flange (F-SC80FA) or LB foot mount (F-SC80LB), can be added for secure installation.
Adjustable-stroke checklist
The cylinder provides a push force of 2513 N at 0.5 MPa and 4523 N at 0.9 MPa. The pull force is 2268 N at 0.5 MPa due to the 25 mm rod area. The rear adjusting screw only changes the stroke end position within a 30 mm range; it does not alter the cylinder's bore, rod diameter, or force output.
It can replace an SC80 if you need the 30 mm field-adjustable stroke feature, but the SCJ body is slightly longer. For a direct dimensional match, you must replace it with another SCJ80 adjustable-stroke cylinder with the same 75 mm nominal stroke, 30 mm adjust range, PT ports, and -S magnet option.
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