The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X25-20 is a genuine double-acting DOUBLE-ROD air cylinder whose rear rod carries the stroke ADJUSTER: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø32mm bore, 25mm nominal stroke, PT1/8 ports and adjustable end cushioning.
Its rear adjusting screw provides a 20 mm stroke-end adjustment range, allowing operators to fine-tune the 25 mm nominal stroke without dismounting the cylinder or adding external hard stops.
Built on a durable tie-rod body with a 12 mm piston rod and PT1/8 ports, this double-acting, double-rod cylinder features a 21 mm air cushion for smooth deceleration. The body length A(SCJ) is 182 mm, offering a space-efficient solution where stroke calibration is needed during commissioning or format changes.
| Model | Airtac SCJ32 Standard Cylinder SCJ32X25-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (double 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 adjuster on the rear rod sets the stroke end position. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 346 N | 346 N |
| 0.7 MPa | 484 N | — |
| Max (@1.0 MPa) | 70 kgf | |
SCJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod SC push of the same bore. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×25 | 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.
Fine-tune the actuator end-stop during vision system or sensor alignment on small test fixtures, using the 20 mm screw adjustment to achieve perfect trigger positioning.
Adjust the retract position of a glue or solder paste dispensing head to match different workpiece heights on a benchtop automated assembly cell.
Create an adjustable part stop on a small conveyor for sorting electronic components, where the stop position is tweaked for different product batches.
Choose the SCJ32X25-20 when you need to dial in a precise end position on a compact machine. For applications where the stroke is fixed and will never need field adjustment, the standard SC32X25 fixed-stroke cylinder is a simpler, cost-effective alternative. This model is a direct replacement for an existing AirTAC SCJ32X25-20 with PT ports and basic mounting.
Adjustable-stroke checklist
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. The pull force is lower due to the area of the 12 mm piston rod.
A screw in the rear cap acts as an internal stroke limiter. By turning it, you can shorten the stroke end by up to 20 mm from the nominal 25 mm maximum. It adjusts the end position only and does not change the cylinder's force or speed.
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