Airtac SCJ32 Standard Cylinder SCJ32X85-20H
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X85-20H 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 SCJ32X85-20H
The SCJ32X85-20H is a 32 mm bore double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the piston stop position by up to 20 mm without swapping the unit. It delivers 402 N of push force at 0.5 MPa, with a 12 mm diameter piston rod and PT1/8 ports, making it a compact workhorse for light positioning tasks.
This variant is built with Viton (FKM) seals, extending the operating temperature range to 0–150 °C for hot or thermally demanding environments. The integral rear-cap adjusting screw shortens the stroke end from the nominal 85 mm maximum, and the 21 mm air cushion at each end decelerates the piston for smooth, low-impact stopping.
Airtac SCJ32 Standard Cylinder SCJ32X85-20H Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X85-20H |
|---|---|
| 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 SCJ32X85-20H
| 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 SCJ32X85-20H Is Used
Commissioning Fine-Tuning
During machine setup, the 20 mm adjustment screw lets technicians dial in the exact end-stop position for a gripper or pusher without re-machining brackets or adding external hard stops.
Wear Take-Up on Stops
On a small indexing conveyor, the adjustable stroke compensates for wear on a mechanical stop pad over time, maintaining precise part placement without immediate part replacement.
Format Changeover
For a light-duty packaging machine running multiple product sizes, operators can quickly adjust the cylinder's stroke end to match a new box width, reducing changeover downtime.
Is the Airtac SCJ32 Standard Cylinder SCJ32X85-20H the Right Cylinder?
Step up to the 40 mm bore SCJ (628 N push at 0.5 MPa) if your load exceeds the 32 mm bore's 402 N push force. For applications that don't require in-field stroke tuning, a fixed-stroke SC32X85 cylinder is a simpler, more cost-effective alternative. This SCJ32X85-20H is a direct dimensional replacement for another AirTAC SCJ32 adjustable-stroke cylinder with the same 85 mm nominal stroke, 20 mm adjust range, PT ports, and Viton seals.
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 SCJ32X85-20H FAQ
At 0.5 MPa, the push force is 402 N and the pull force is 345 N. The maximum push force at the 0.9 MPa operating limit is 724 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the rod area on the return side.
A rear-cap screw lets you shorten the stroke end by up to 20 mm from the 85 mm nominal maximum. Choose the SCJ when you need to fine-tune the piston stop position on the machine during commissioning, for format changes, or to compensate for wear. If your stroke length is fixed and never needs field adjustment, the standard SC series is the better choice.
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