Airtac SCJ50 Standard Cylinder SCJ50X50-30TC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30TC 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. Ø50mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-30TC
The SCJ50X50-30TC is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end adjustment directly on the machine. Its rear-cap screw gives you up to 30 mm of adjustment range, so you can dial in the exact stop position for a 50 mm nominal stroke without swapping the cylinder or adding external hard stops. The 20 mm piston rod and M16x1.5 rod thread handle push forces of 982 N at 0.5 MPa, making it a practical workhorse for medium-force positioning tasks.
This model ships with a centre trunnion (TC) mount and the matching TCM1 bracket, allowing the cylinder to pivot and self-align in swinging or articulating linkages. The PT1/4 port, 21 mm air cushion, and TPU seals are standard. With a body length A of 194 mm, it fits into constrained spaces where a fixed-stroke cylinder would require more complex end-stop tooling. It is a genuine AirTAC component built for repeatable, on-the-fly stroke tuning.
Airtac SCJ50 Standard Cylinder SCJ50X50-30TC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCJ50 Standard Cylinder SCJ50X50-30TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | 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 SCJ50 Standard Cylinder SCJ50X50-30TC Is Used
Commissioning & Fine-Tuning
During machine bring-up, the 30 mm adjustment screw lets technicians quickly set the exact stroke end for grippers, clamps, or ejectors without iterative disassembly. This cuts commissioning time on new assembly stations.
Format Changeover on Packaging Lines
When a packaging machine switches between box sizes, the adjustable stroke allows operators to re-set the pusher stroke end in seconds. The centre trunnion mount lets the cylinder pivot freely, accommodating slight misalignments in the linkage.
Wear Compensation in Clamping Fixtures
In high-cycle welding or machining fixtures, clamp pads wear over time. The rear adjusting screw provides a quick way to take up the resulting slack and restore full clamping force without replacing the cylinder or machining new stops.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-30TC the Right Cylinder?
Step up to the SCJ63 series if you need more force—the 63 mm bore delivers 1559 N push at 0.5 MPa, a significant jump for heavier guided tooling. For applications that never need stroke adjustment, a fixed-stroke SC50 cylinder is a simpler, lower-cost alternative. If the load requires guided motion to prevent rod rotation, pair this cylinder with an external guide or choose a guided cylinder instead.
This SCJ50X50-30TC is a direct replacement for another AirTAC SCJ adjustable-stroke cylinder of the same 50 mm bore, 50 mm nominal stroke, 30 mm adjustment range, PT ports, and TC centre trunnion mount. The F-SC50TC mounting kit is included.
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 SCJ50 Standard Cylinder SCJ50X50-30TC FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The pull force is lower because the 20 mm piston rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1964 N.
Yes, if you need field-adjustable stroke. The SCJ50X50-30TC matches the SC50's bore, port size (PT1/4), and mounting footprint for the TC trunnion. The overall body length is slightly longer to house the adjustment mechanism (A=194 mm), so verify your space envelope.
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