Airtac SCJ32 Standard Cylinder SCJ32X255-20
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X255-20 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, 255mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke255 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X255-20
The SCJ32X255-20 is a 32 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, allowing precise end-position tuning during commissioning or format changes without swapping the cylinder. It delivers 402 N of push force and 345 N of pull force at 0.5 MPa, with a 12 mm diameter piston rod and PT1/8 ports.
This tie-rod cylinder uses filtered air and operates from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa. The standard TPU seal handles temperatures from -20 to +70 °C, and the adjustable air cushion decelerates the piston smoothly. With a body length A of 182 mm, it is a compact solution for applications needing a fine-tuned end stop within a 20 mm window.
Airtac SCJ32 Standard Cylinder SCJ32X255-20 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X255-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 255 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 SCJ32X255-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×255 | 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 SCJ32X255-20 Is Used
Commissioning & Setup
Fine-tune the end-of-stroke position during machine commissioning. The 20 mm adjustment screw lets technicians dial in the exact stop point for grippers, clamps, or pushers without needing to remachine mounting brackets.
Wear Compensation
In high-cycle assembly fixtures, tooling tips can wear down. The adjustable stroke on the SCJ32 allows operators to easily compensate for this wear by extending the effective stroke, maintaining consistent part contact and quality.
Small-Part Sorting Gates
Use the SCJ32X255-20 to actuate a diverter gate on a conveyor. The adjustable stroke lets you fine-tune the gate's open position for different product sizes, ensuring reliable sorting without jams.
Is the Airtac SCJ32 Standard Cylinder SCJ32X255-20 the Right Cylinder?
Choose the SCJ32X255-20 when your machine requires a 255 mm stroke that can be trimmed back by up to 20 mm on the machine. If you need more push force, step up to the 40 mm bore SCJ40 series, which provides 628 N of push at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC32 series is a simpler alternative. This model is a direct replacement for another AirTAC SCJ32 cylinder with a 255 mm nominal stroke, 20 mm adjustment range, PT threads, and basic mounting.
For a 255 mm stroke, consider the potential for side loading. If the rod is exposed to lateral forces, use an external linear guide or switch to a guided cylinder to prevent rod bending and premature seal wear.
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 SCJ32X255-20 FAQ
At the standard operating pressure of 0.5 MPa, this cylinder provides 402 N of push force and 345 N of pull force. The push force is higher because it acts on the full 32 mm bore area, while the pull force is reduced by the area of the 12 mm piston rod.
A screw mechanism in the rear cap allows you to shorten the stroke end position by up to 20 mm. This is a mechanical stop adjustment, not a speed or force control. It allows you to fine-tune the piston's stopping point in the field without changing the cylinder's nominal 255 mm maximum stroke.
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