Airtac SEJ Adjustable Cylinder SEJ63X75-75S
The AirTAC Airtac SEJ Adjustable Cylinder SEJ63X75-75S 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 75mm window, so this Ø63mm unit covers an effective stroke of 0–75mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke75 mm
- Adjust window75 mm
- Effective stroke0–75 mm
- Port sizePT3/8
- CushionAdjustable, 36 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 SEJ63X75-75S
The AirTAC SEJ63X75-75S is a double-acting, double-rod ISO 15552 profile cylinder featuring a mechanically adjustable retract stroke. A stop screw on the back rod lets you dial the retract end over a 75 mm window, yielding an effective stroke range of 0 to 75 mm. This is ideal for dialing in exact end positions during machine commissioning without swapping hardware.
Because a rod exits both ends, the annular area is identical in both directions, delivering an equal force of 1402 N each way at 0.5 MPa. The extruded aluminum barrel omits external tie rods, and the included -S magnet enables precise end-of-stroke detection using CMSE reed or DMSE electronic sensors.
Airtac SEJ Adjustable Cylinder SEJ63X75-75S Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63X75-75S |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 75 mm |
| Adjustment window | 75 mm (0–75 mm) |
| Configuration | Double rod, double acting |
| Port size | PT3/8 |
| Rod thread | M16×1.5 |
|---|---|
| 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, 36 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 75mm window. Port options: PT (standard) / G (BSPP).
Theoretical Output Force (Ø63mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 1402 N |
| 0.7 MPa | 1962 N |
| Max (@1.0 MPa) | 286 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 SEJ63X75-75S
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -75 | 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 SEJ63X75-75S Is Used
Press Tonnage Calibration
Dial in the exact 0-75 mm stroke during light-duty assembly press commissioning, leveraging the 1402 N both-way force to seat components without over-traveling.
Multi-Height Pallet Stops
Adjust the retract end on the fly to accommodate different pallet heights on a conveyor line, using the equal push/pull force to halt and release loads smoothly.
Welding Electrode Gap Setting
Fine-tune the 75 mm stroke range to set precise electrode gaps for spot welding guns, relying on the -S magnet to trigger DMSE electronic sensors at the exact setpoint.
Is the Airtac SEJ Adjustable Cylinder SEJ63X75-75S the Right Cylinder?
Confirm the 75 mm adjustment window covers your required positioning range. If you need less fine-tuning, a fixed-stroke SED provides a simpler setup. Stepping down to a 50 mm bore yields 825 N at 0.5 MPa, while stepping up to an 80 mm bore provides 2268 N at 0.5 MPa. This 63 mm bore hits a solid 1962 N at 0.7 MPa. Note that the adjustable air cushion decelerates the load near stroke ends but does not function as a fail-safe brake; for position holding on air loss, use an external rod lock. When matching ISO 15552 replacements, verify the PT3/8 port, M16x1.5 rod thread, and 36 mm cushion length.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (75mm) 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 75mm 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 SEJ63X75-75S FAQ
The retract stroke can be mechanically adjusted over a 75 mm window using a stop screw on the back rod. This gives an effective stroke range of 0 to 75 mm, which you lock in place once the desired end position is set.
Because the rod exits both ends, force is identical in both directions. It provides 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and a maximum of 286 kgf at 1.0 MPa.
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