Airtac SCJ32 Standard Cylinder SCJ32X50-20
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X50-20 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. Ø32mm bore, 50mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke50 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X50-20
The SCJ32X50-20 is a 32 mm bore double-acting single-rod cylinder with a rear adjusting screw that lets you shorten the stroke end by up to 20 mm without swapping the unit. At 0.5 MPa it delivers 402 N push and 345 N pull, making it a compact choice for light clamping, sorting gates and small transfer mechanisms.
A 12 mm diameter rod and PT1/8 ports keep the footprint small, while the built-in 21 mm air cushion decelerates the piston quietly. The tie-rod body (A length 182 mm) is straightforward to service, and the screw adjustment is ideal for commissioning fine-tuning or taking up wear on a mechanical stop.
Airtac SCJ32 Standard Cylinder SCJ32X50-20 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X50-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| 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 1000 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 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 SCJ32 Standard Cylinder SCJ32X50-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×50 | 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 SCJ32 Standard Cylinder SCJ32X50-20 Is Used
Commissioning Fine-Tuning
Dial in the exact stroke end position during machine setup without removing the cylinder, saving hours of mechanical rework on small pick-and-place stations.
Wear Take-Up on Stops
As rubber bumpers or mechanical stops wear on a light-duty conveyor diverter, the 20 mm screw adjustment restores the correct end position without replacing the stop.
Small-Part Clamping
Adjust the clamp closure point for different part thicknesses in a light assembly fixture, using the 402 N push force to hold parts securely without crushing them.
Is the Airtac SCJ32 Standard Cylinder SCJ32X50-20 the Right Cylinder?
Step up to the SCJ40X50-20 (628 N push at 0.5 MPa) if you need more force in the same 50 mm nominal stroke. If the stroke never needs field adjustment, the fixed-stroke SC32X50 is a simpler, slightly shorter alternative. For a direct replacement, match an SCJ32X50-20 with PT ports and basic mounting.
At 50 mm stroke side-load is rarely an issue, but always align the rod with the load axis. If the application requires guided motion, consider adding an external guide rail rather than a larger cylinder.
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 SCJ32 Standard Cylinder SCJ32X50-20 FAQ
At 0.5 MPa it produces 402 N pushing and 345 N pulling. At the maximum operating pressure of 0.9 MPa, push force reaches 724 N. The pull force is lower because the 12 mm rod reduces the piston area on the return stroke.
Only if you need the adjustable stroke feature. The SCJ body is slightly longer due to the rear adjusting screw. If the extra length fits and you want field-adjustable stroke end, the SCJ32X50-20 is a direct functional upgrade with the same bore, stroke and port size.
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