Airtac SCJ50 Standard Cylinder SCJ50X600-20S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X600-20S 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. Ø50mm bore, 600mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke600 mm
- Stroke adjust-20 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X600-20S
The SCJ50X600-20S is a 50 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 20 mm of stroke shortening, letting you fine-tune the end position without changing the cylinder. At 0.5 MPa, it delivers 982 N of push force and 825 N of pull force, with a 20 mm piston rod and PT1/4 ports.
This model includes a built-in magnet (-S), allowing direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for electronic end-of-stroke detection. The 600 mm nominal stroke is well within the 1200 mm maximum for this bore, and the standard TPU seals offer reliable operation from -20 to +70 °C. The adjustable cushion decelerates the piston smoothly at both ends.
Airtac SCJ50 Standard Cylinder SCJ50X600-20S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X600-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 600 mm |
| Stroke adjustment | Up to 20 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 SCJ50X600-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×600 | 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 SCJ50 Standard Cylinder SCJ50X600-20S Is Used
End-Stop Commissioning
Fine-tune the retract stroke end by up to 20 mm during machine setup to perfectly align a stop position without re-plumbing or swapping the cylinder.
Wear Take-Up on Stops
Compensate for mechanical wear on a conveyor stop or clamp face over time by adjusting the screw, maintaining precise positioning without downtime.
Format Changeover
Quickly adapt the stroke end for different product sizes in a packaging or sorting line, using the magnet to confirm the new position via a sensor.
Is the Airtac SCJ50 Standard Cylinder SCJ50X600-20S the Right Cylinder?
Choose this SCJ when you need to commission a 600 mm stroke with the ability to dial in the exact end position. If 825 N of pull force is marginal, stepping up to a 63 mm bore (SCJ63) provides 1402 N of pull at the same pressure. For applications where the stroke is fixed and never needs field adjustment, the standard SC50X600 is a simpler, lower-cost alternative. A direct replacement must match the 50 mm bore, 600 mm nominal stroke, 20 mm adjust range, PT port thread, and the built-in magnet. For this 600 mm stroke, ensure the rod is not subjected to high side loads; use an external guide rail or switch to a guided cylinder if lateral forces are present.
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 SCJ50 Standard Cylinder SCJ50X600-20S FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
Yes, if you need the 20 mm stroke-end adjustment. The SCJ50X600-20S shares the same 50 mm bore, 600 mm nominal stroke, and PT1/4 ports. The body length A(SCJ) is 194 mm, which is slightly longer than the fixed-stroke SC version to accommodate the adjusting screw.
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