Airtac SCJ50 Standard Cylinder SCJ50X80-10STC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X80-10STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke80 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X80-10STC
The SCJ50X80-10STC is a 50 mm bore, single-rod double-acting cylinder that lets you fine-tune the stroke end by up to 10 mm using the rear adjusting screw—no need to swap the cylinder or add external hard stops during commissioning. Its 20 mm rod and PT1/4 ports deliver 982 N of push force at 0.5 MPa, rising to 1767 N at 0.9 MPa, making it a practical choice for medium-force positioning tasks where the final stroke length must be dialled in on the machine.
This model ships with a built-in magnet (-S) so CMSG/DMSG/EMSG sensors clip directly onto the tie-rod barrel for end-of-stroke or mid-stroke sensing. The TC centre trunnion mounting (supplied with the TCM1 bracket, order code F-SC50TC) allows the cylinder to pivot, absorbing angular misalignment in swinging or lever-actuated mechanisms. The 21 mm air cushion at each end decelerates the piston smoothly, and the standard TPU seals cover -20 to +70 °C with filtered air at 0.15-1.0 MPa.
Airtac SCJ50 Standard Cylinder SCJ50X80-10STC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X80-10STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 10 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 SCJ50X80-10STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×80 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ50X80-10STC Is Used
Format Changeover on Packaging Lines
The 10 mm rear screw adjustment lets operators quickly reset the end stop when switching between box sizes or product formats, without dismounting the cylinder or reprogramming a servo drive.
Pivoting Clamp with Sensor Feedback
The TC trunnion mount allows the cylinder to swing freely while the built-in magnet triggers a CMSG sensor at the clamped position, confirming the part is secured before the next cycle.
Wear Take-Up on Pressing Stations
As tooling or pads wear over thousands of cycles, the stroke end can be advanced by a few millimetres via the rear screw to maintain consistent pressing depth without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X80-10STC the Right Cylinder?
Choose the SCJ50X80-10STC when you need a 50 mm bore with a nominal 80 mm stroke that can be shortened by up to 10 mm at the rear screw—ideal for format changeovers or wear take-up on a pivoting linkage. If your force requirement is lower, the 40 mm bore SCJ40 series provides 628 N push at 0.5 MPa; for heavier work, the 63 mm bore SCJ63 delivers 1559 N push at the same pressure. For a direct replacement, match the 50 mm bore, 80 mm nominal stroke, 10 mm adjust range, PT port thread, TC centre trunnion mount, and the built-in magnet—this ensures the same pivot geometry and sensor compatibility. If the stroke never needs field adjustment, a fixed-stroke SC50X80 with the same mount and magnet is a simpler alternative.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ50X80-10STC FAQ
At 0.5 MPa the push force is 982 N and the pull force is 825 N (the pull is lower because the 20 mm rod reduces the piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N. Always size the cylinder using the pull force if the return stroke does the work.
Yes, provided the old unit is an SCJ with a 50 mm bore, 80 mm nominal stroke, 10 mm adjust range, PT ports, TC centre trunnion mount, and a built-in magnet. The F-SC50TC trunnion bracket and sensor groove spacing are unchanged, so the new cylinder drops into the same pivot points and sensor positions.
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