Airtac SCJ32 Standard Cylinder SCJ32X85-20
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X85-20 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, 85mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke85 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X85-20
The SCJ32X85-20 delivers up to 85 mm of nominal stroke with a 20 mm rear adjusting screw for field-tunable end positioning, making it a practical choice for compact automation where a fixed stroke would require shimming or external stops. Its 12 mm piston rod and 21 mm air cushion help absorb end-of-stroke impact at speeds up to 800 mm/s.
With 402 N of push force at 0.5 MPa (724 N at the 0.9 MPa maximum operating pressure), this double-acting, single-rod cylinder handles light clamping, sorting, and assembly tasks. The tie-rod construction keeps the body length to 182 mm (A dimension), and the PT1/8 ports accept standard pneumatic fittings.
Airtac SCJ32 Standard Cylinder SCJ32X85-20 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X85-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 85 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 SCJ32X85-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×85 | 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 SCJ32X85-20 Is Used
Commissioning Fine-Tuning
Dial in the exact end-stop position during machine setup without cutting brackets or adding shims, using the 20 mm screw adjustment to compensate for assembly tolerances.
Small-Part Diverter Gates
Adjust the gate opening stroke on a packaging line to handle different product widths, changing the end position in seconds rather than swapping the cylinder.
Wear Compensation in Clamping
Take up pad wear on a light-duty clamp by shortening the stroke end via the rear screw, maintaining consistent clamping force without reprogramming the PLC.
Is the Airtac SCJ32 Standard Cylinder SCJ32X85-20 the Right Cylinder?
For applications needing a bit more force, the 40 mm bore SCJ provides 628 N push at 0.5 MPa. If the stroke never needs field adjustment, the fixed-stroke SC32 series offers the same mounting and force in a slightly shorter body. When replacing an existing SCJ32 adjustable unit, match the 32 mm bore, 85 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting style.
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 SCJ32X85-20 FAQ
At 0.5 MPa it delivers 402 N pushing and 345 N pulling (the pull force is lower because the 12 mm rod reduces the piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 724 N.
Yes, if you need the 20 mm stroke-end adjustment. The SCJ32X85-20 shares the same 32 mm bore, PT1/8 ports, and basic mounting pattern as an SC32, but the body is slightly longer to house the adjusting screw. Ensure the 85 mm nominal stroke and 20 mm adjust range fit your machine envelope.
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