The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X75-30 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, 75mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X75-30 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, built around an 80 mm bore and a 25 mm diameter piston rod. The rear-cap adjusting screw lets you shorten the effective stroke by up to 30 mm without removing the cylinder, delivering a push force of 2513 N at 0.5 MPa and up to 4523 N at 0.9 MPa. Its tie-rod construction and 28 mm air cushion make it a robust choice for applications where the end position needs regular fine-tuning.
With a body length A of 239 mm and a PT3/8 port, this unit fits into layouts where a fixed-stroke 80 mm bore cylinder would otherwise require external hard stops. The adjustable range is ideal for commissioning trials, format changeovers on packaging lines, or compensating for tooling wear over time. The M20x1.5 rod thread provides a solid connection for tooling, and the standard TPU seals cover a -20 to +70 °C operating window.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X75-30 |
|---|---|
| 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.
During machine commissioning, the 30 mm adjustment screw lets technicians precisely set the end-of-stroke position for grippers or pushers without swapping cylinders or machining custom stops, speeding up the final alignment process.
On a packaging line, operators can quickly adjust the stroke of an 80 mm bore cylinder to accommodate different box heights or product sizes by turning the rear screw, minimizing downtime between production runs.
In clamping or pressing fixtures, the adjustable stroke end compensates for gradual wear on tooling or workpieces. The 2513 N push force at 0.5 MPa provides ample power, while the screw maintains consistent clamp depth over thousands of cycles.
Choose the SCJ80 when you need the 2513 N push force at 0.5 MPa that an 80 mm bore provides but also require the ability to dial in the stroke end position. If your force requirement drops to around 1559 N, stepping down to a 63 mm bore SCJ63 can reduce air consumption and physical size. For applications needing a fixed, unchangeable stroke, the standard SC80 series is a simpler, lower-cost alternative. This model is a direct replacement for another AirTAC SCJ80X75-30 with PT ports and basic mounting; ensure the -30 adjustment range matches your machine's setup.
At a 75 mm nominal stroke, rod bending from side loads is generally not a concern with proper alignment, but always avoid direct lateral force on the rod end. If your application involves guided payloads or off-axis loads, consider pairing the cylinder with an external guide rail or switching to a guided cylinder series.
Adjustable-stroke checklist
The push force is 2513 N at 0.5 MPa and 4523 N at 0.9 MPa. The pull force is lower due to the single 25 mm rod, providing 2268 N at 0.5 MPa. The adjusting screw does not change these force values; it only sets the stroke end position.
You can replace an SC80 with an SCJ80X75-30 if you need the adjustable stroke feature and the 75 mm nominal stroke with 30 mm adjustment range fits your space. The body length A of the SCJ is 239 mm, which is slightly longer than a fixed-stroke SC80 of the same bore. Ensure the port size (PT3/8), mounting style, and rod thread (M20x1.5) match your current setup.
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