Airtac SEJ Adjustable Cylinder SEJ63X320-100
The AirTAC Airtac SEJ Adjustable Cylinder SEJ63X320-100 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 100mm window, so this Ø63mm unit covers an effective stroke of 220–320mm without changing cylinders. Force is equal in both directions.
- BoreØ63 mm
- Nominal stroke320 mm
- Adjust window100 mm
- Effective stroke220–320 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 SEJ63X320-100
The AirTAC SEJ63X320-100 is a double-acting, double-rod ISO 15552 profile cylinder offering a 100 mm mechanical stroke adjustment window. You can dial the retract end-position anywhere in an effective 220 to 320 mm range using the back-rod stop screw, then lock it down. Because a rod exits both ends, the annulus area is symmetrical, delivering an equal 1402 N of force each way at 0.5 MPa.
This 63 mm bore unit runs on PT3/8 ports and relies on a 36 mm field-adjustable air cushion at both ends to decelerate the load near stroke end. The extruded aluminum barrel carries no external tie rods, ensuring clean ISO 15552 dimensional interchangeability. Note this specific SKU lacks a magnet, so it will not trigger CMSE or DMSE position sensors.
Airtac SEJ Adjustable Cylinder SEJ63X320-100 Technical Specifications
| Model | Airtac SEJ Adjustable Cylinder SEJ63X320-100 |
|---|---|
| Series | SEJ ISO 15552 adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 320 mm |
| Adjustment window | 100 mm (220–320 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 100mm 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 SEJ63X320-100
| SEJ | ISO 15552 double-rod double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×320 | Nominal stroke length in mm. |
| -100 | 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 SEJ63X320-100 Is Used
Press Die Changeover
Dial the 100 mm stop screw to match varying die heights during press tooling changeovers, using the 1962 N both-way force to shift heavy lower dies precisely into the working zone.
Variable-Stop Diverters
Adjust the retract end on the fly to hit different pallet widths on a packaging line, exploiting the equal push and pull forces to cleanly index product stops without re-mounting hardware.
Prototype Clamp Positioning
Fine-tune the clamping depth across a 220-320 mm window during R&D machine commissioning, locking the back-rod screw once the exact 1402 N @0.5 MPa clamping force and position are validated.
Is the Airtac SEJ Adjustable Cylinder SEJ63X320-100 the Right Cylinder?
Verify your target retract position falls inside the 220-320 mm effective range to make full use of the 100 mm stop-screw window. If you need less force, the adjacent 50 mm bore provides 825 N both ways at 0.5 MPa; stepping up to the 80 mm bore yields 2268 N at 0.5 MPa. If your end-position never changes after commissioning, a fixed-stroke SED avoids the adjustment hardware entirely.
Because the 320 mm nominal stroke exceeds 300 mm, external guides are recommended to counter side-load and protect the M16x1.5 rod threads. Remember the air cushion and mechanical stop only set the end position and decelerate the load; they do not function as a fail-safe rod lock. If you need position holding on air loss, specify an external locking mechanism.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Adjustment window (100mm) 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 100mm 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 SEJ63X320-100 FAQ
The cylinder has a 100 mm adjustment window via a stop screw on the back rod. This allows you to mechanically set the retract stroke anywhere in an effective range of 220 mm up to the full 320 mm nominal stroke.
Because it is a double-rod cylinder, force is identical in both directions: 1402 N at 0.5 MPa, 1962 N at 0.7 MPa, and a maximum of 286 kgf at 1.0 MPa. It is built to ISO 15552 dimensional standards, so it drops into existing 63 mm bore mounting footprints using Basic, FA, LB, TC, FTC, TCM1, or TCM2 brackets.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SEJ Cylinders
Request a Quote for Airtac SEJ Adjustable Cylinder SEJ63X320-100
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.