Airtac SCJ80 Standard Cylinder SCJ80X150-20
The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X150-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 150mm nominal stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Nominal stroke150 mm
- Stroke adjust-20 mm
- Port sizePT3/8
- Rod threadM20×1.5
- CushionAdjustable, 28 mm
About the Airtac SCJ80 Standard Cylinder SCJ80X150-20
The SCJ80X150-20 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 150mm nominal stroke by up to 20mm via the rear-cap screw. This 80mm bore unit delivers a substantial 2513 N of push force at 0.5 MPa, making it a workhorse for pressing, clamping, and material-handling stations that need a repeatable but tweakable end position.
Its 25mm diameter piston rod and PT3/8 ports ensure robust air flow for consistent cycling. A 28mm air cushion at each end decelerates the piston silently, while the adjustable screw sets the exact stop point without requiring external hard stops. The tie-rod construction simplifies maintenance, and the body length A is 239mm.
Airtac SCJ80 Standard Cylinder SCJ80X150-20 Technical Specifications
| Model | Airtac SCJ80 Standard Cylinder SCJ80X150-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 20 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.
Theoretical Output Force (Ø80mm)
| 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.
Model Code: Airtac SCJ80 Standard Cylinder SCJ80X150-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Where the Airtac SCJ80 Standard Cylinder SCJ80X150-20 Is Used
Commissioning & Setup
During machine commissioning, the 20mm adjustment range allows engineers to dial in the perfect stroke end position for grippers or pushers without fabricating custom shims or stops.
Product Format Changeover
On packaging lines, operators can quickly adjust the cylinder's stroke to accommodate different box sizes or pallet patterns, reducing downtime between production runs.
Wear Compensation
In high-cycle pressing or riveting fixtures, the adjustable screw can be advanced to compensate for tooling wear over time, maintaining consistent part quality without replacing the cylinder.
Is the Airtac SCJ80 Standard Cylinder SCJ80X150-20 the Right Cylinder?
Choose this 80mm bore when the 63mm unit's 1559 N push force at 0.5 MPa is marginal and you need a stronger actuator without jumping to the 100mm bore's 3927 N. If your application does not need stroke-end adjustment, the fixed-stroke SC80X150 is a simpler alternative. For a drop-in replacement, match an SCJ80X150-20 with PT ports and basic mounting; if your unit has a magnet or mounting, ensure the replacement carries the same -S, LB, FA, or TC suffix.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ80 Standard Cylinder SCJ80X150-20 FAQ
At 0.5 MPa, this 80mm bore cylinder generates 2513 N of push force and 2268 N of pull force. The push force is higher because the single rod reduces the piston area on the return side. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 5026 N.
Yes, if you need the ability to fine-tune the stroke end. The SCJ80X150-20 shares the same bore, nominal stroke, and mounting accessories as the SC80, but the rear adjusting screw adds 20mm of field-adjustable range. Ensure the port thread (PT), magnet option, and mounting style match your current setup.
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