Airtac SEJ Adjustable Cylinder SEJ32X75-50S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ32X75-50S is a genuine double-acting ISO 15552 double-rod cylinder with a mechanically ADJUSTABLE stroke: a back-rod stop screw lets you fine-tune the retract end over a 50mm window, so this Ø32mm unit covers an effective stroke of 25–75mm without changing cylinders. Force is equal in both directions.
- BoreØ32 mm
- Nominal stroke75 mm
- Adjust window50 mm
- Effective stroke25–75 mm
- Port sizePT1/8
- CushionAdjustable, 27 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SEJ Adjustable Cylinder SEJ32X75-50S
The AirTAC SEJ32X75-50S is a double-acting, double-rod ISO 15552 profile cylinder featuring an adjustable retract stroke. A back-rod stop screw lets you dial the retract end over a 50 mm window, giving an effective stroke range of 25 to 75 mm. This mechanical adjustability is ideal for fine-tuning end positions directly on the machine during commissioning without changing hardware.
Because a rod exits both ends, the annular area is identical in both directions, yielding an equal force of 345 N each way at 0.5 MPa. The extruded aluminum barrel carries no external tie rods, and the field-adjustable air cushions at both ends decelerate the motion near stroke end. This unit includes a magnet for CMSE reed and DMSE electronic sensors.
Airtac SEJ Adjustable Cylinder SEJ32X75-50S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ32X75-50S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 50 mm (25–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C (0–150 °C with FKM seals) |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 27 mm |
Specifications follow the official AirTAC SEJ datasheet and ISO 15552 / VDMA 24562 dimensions. The adjustment screw shortens the retract end only; do not exceed the 50mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø32mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 346 N |
| 0.7 MPa | 484 N |
| Max (@1.0 MPa) | 70 kgf |
A rod exits both ends, so extend and retract force are identical. Actual usable force is lower than theoretical; size with a safety margin.
Model Code: Airtac SEJ Adjustable Cylinder SEJ32X75-50S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 32 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -50 | Adjustment stroke window in mm (options: 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B). Seals: TPU (blank) / FKM high-temp (H) / NBR (N). Thread: PT (blank) / G. Mounting (SEJ): Basic, LB, FA, TC, FTC, TCM1, TCM2. Related: SED (double rod, fixed stroke), SE (single rod).
Where the Airtac SEJ Adjustable Cylinder SEJ32X75-50S Is Used
Machine Commissioning
Dial in the 50 mm retract window to set exact 25-75 mm end positions on a packaging machine, using the 345 N both-way force to dial-in the stroke during setup.
Part Changeover
Switch the stop height for different product sizes on a conveyor sorter, adjusting the cylinder end without swapping hardware while relying on equal push and pull force.
Trial Positioning
Find the exact clamping point on a test fixture by adjusting the retract stroke against a variable stop, benefiting from the stable guidance of the dual-rod design.
Is the Airtac SEJ Adjustable Cylinder SEJ32X75-50S the Right Cylinder?
Confirm the 50 mm adjustment window covers your positioning range; if you need less travel variability, a fixed-stroke SED is sufficient. The 32 mm bore delivers 345 N both ways at 0.5 MPa. If sizing force, the next bore down is not available in this series, but the next bore up (40 mm) provides 528 N both ways at 0.5 MPa. For drop-in ISO 15552 replacement, verify the 75 mm nominal stroke, 50 mm window, PT1/8 port, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, TCM2). A plain SEJ does not hold position on air loss; use a BSED or external rod lock for fail-safe holding.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (50mm) covers your range
- ✓ Equal force both directions OK
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for CMSE/DMSE 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 stop screw within the 50mm window; lock it after adjusting.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (LB/FA/TC/FTC/TCM1/TCM2).
- check Installation by qualified personnel per AirTAC docs.
Airtac SEJ Adjustable Cylinder SEJ32X75-50S FAQ
The retract end can be dialed in over a 50 mm window, giving an effective stroke range of 25 to 75 mm. You set the mechanical end with a stop screw on the back rod and lock it after positioning.
Because the rod exits both ends, force is equal in both directions. It provides 345 N at 0.5 MPa, 483 N at 0.7 MPa, and a maximum of 70 kgf at 1.0 MPa.
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