Airtac SCJ50 Standard Cylinder SCJ50X500-30S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X500-30S 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke500 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X500-30S
The SCJ50X500-30S is a double-acting, single-rod pneumatic cylinder that puts fine stroke control directly in your hands. With a 30 mm rear adjusting screw, you can dial in the exact stroke end position on the fly—ideal for commissioning runs or accommodating part tolerances without swapping the cylinder. At 0.5 MPa, it delivers 982 N of push force, while the 20 mm piston rod ensures robust linear guidance.
This model features a built-in magnet, allowing CMSG, DMSG, or EMSG sensors to be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The 50 mm bore body has a length of 194 mm, and the standard PT1/4 port keeps plumbing straightforward. The adjustable air cushion decelerates the piston smoothly, protecting your tooling at the end of each 500 mm cycle.
Airtac SCJ50 Standard Cylinder SCJ50X500-30S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X500-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 500 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 SCJ50X500-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SCJ50X500-30S Is Used
Format Changeovers
Quickly adjust the stroke end to match new product dimensions on packaging or labeling machines, minimizing downtime between batches.
Wear Compensation
Fine-tune the end position to compensate for gripper pad wear or tooling drift in automated assembly cells, maintaining consistent part placement.
Material Handling Stops
Set a precise, adjustable hard stop for pallets or boxes on a conveyor line, allowing operators to fine-tune the stopping point for different load sizes.
Is the Airtac SCJ50 Standard Cylinder SCJ50X500-30S the Right Cylinder?
Choose the SCJ50X500-30S when your application demands a 500 mm stroke with the ability to trim up to 30 mm from the end position. If your force requirements increase, stepping up to the 63 mm bore provides 1559 N of push force at the same pressure. For a simpler, fixed-stroke solution, the standard SC series is a direct alternative when adjustability is not needed. This cylinder is a direct replacement for any AirTAC SCJ50X500-30S with a PT port and built-in magnet.
For a stroke of this length, be mindful of side-loading. The 20 mm rod can handle axial loads well, but any significant radial force will cause rod bending. If your application involves off-center loads, consider adding an external guide rail or switching to a guided cylinder assembly to ensure long service life.
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 SCJ50X500-30S FAQ
A screw mechanism in the rear cap allows you to shorten the stroke end by up to 30 mm. The 500 mm nominal stroke is the maximum; you can reduce it to a minimum of 470 mm. This adjustment only changes the piston's stopping point, not the cylinder's force or speed.
No, as a standard double-acting cylinder, it will drift or drop if pressure is lost or the valve is centered. The adjustable screw sets the stroke end but does not lock the piston. For load holding without pressure, you must add a pilot-operated check valve or an external mechanical rod lock.
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