Airtac SCJ80 Standard Cylinder SCJ80X50-30TC
The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X50-30TC 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, 50mm nominal stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Nominal stroke50 mm
- Stroke adjust-30 mm
- Port sizePT3/8
- Rod threadM20×1.5
- CushionAdjustable, 28 mm
About the Airtac SCJ80 Standard Cylinder SCJ80X50-30TC
The SCJ80X50-30TC is an 80 mm bore double-acting single-rod cylinder with a rear adjusting screw that lets you fine-tune the stroke end by up to 30 mm without removing the cylinder. Its 25 mm diameter rod delivers 2513 N of push force at 0.5 MPa, making it a solid mid-range actuator for positioning tasks that need on-machine adjustment.
This model ships with a centre trunnion mount (TC) and the TCM1 bracket, so it can pivot during operation. The body length A(SCJ) is 239 mm, and the 28 mm air cushion at each end decelerates the piston smoothly. Ports are PT3/8, and the standard temperature range is -20 to +70 °C with TPU seals.
Airtac SCJ80 Standard Cylinder SCJ80X50-30TC Technical Specifications
| Model | Airtac SCJ80 Standard Cylinder SCJ80X50-30TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 50 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.
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 SCJ80X50-30TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×50 | 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.
Where the Airtac SCJ80 Standard Cylinder SCJ80X50-30TC Is Used
Commissioning & Setup
The 30 mm rear screw allows maintenance teams to dial in the exact stroke end position during machine commissioning without swapping cylinders or fabricating external hard stops.
Pivoting Conveyor Gates
The centre trunnion mount lets the cylinder swing as it actuates a diverter gate. The adjustable stroke fine-tunes the gate's open angle to match different product widths.
Clamp Stroke Take-Up
On a welding or assembly fixture, the screw compensates for wear on clamp pads over time, maintaining consistent clamping force without reprogramming the machine.
Is the Airtac SCJ80 Standard Cylinder SCJ80X50-30TC the Right Cylinder?
Choose the SCJ80 when you need roughly 2.5 kN of push force at standard shop air. If your load is lighter, stepping down to a 63 mm bore (1559 N push at 0.5 MPa) can reduce air consumption and physical size; for heavier work, the 100 mm bore delivers 3927 N push. The 30 mm adjustable stroke end is ideal for commissioning and format changeovers where the stop position needs field tweaking.
This cylinder is a direct replacement for another AirTAC SCJ80X50-30TC with PT3/8 ports and a centre trunnion mount. If you do not need the pivoting action, the basic or LB foot-mounted SCJ80 variants are simpler. For applications with high side loads, add an external guide rail or consider a guided cylinder to protect the rod and bearings.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ80X50-30TC FAQ
At 0.5 MPa the push force is 2513 N and the pull force is 2268 N (the pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke). At the maximum operating pressure of 1.0 MPa, the theoretical push force is 5026 N.
Only if you need the rear stroke-end adjustment. The SCJ80 body is slightly longer than a fixed-stroke SC80 of the same nominal stroke to accommodate the adjusting screw. The mounting footprint and port locations are the same, but you must verify the extra length fits your machine. The replacement must match the bore, nominal stroke, port thread, and mounting style.
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