Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75
The AirTAC SAIJ63X275-75 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 1559 N push force at 0.5 MPa, utilizing a PT G3/8 port and a 20 mm rod. The built-in rear stopper allows you to fine-tune the effective travel anywhere within a 200 to 275 mm window, providing exact end-position tuning without swapping out hardware.
This specific configuration incorporates an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance in humid environments. As an extruded aluminum profile cylinder, it includes sensor grooves on both sides for CMSE or DMSE switches, though note this SKU is supplied without a magnet. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 275 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×275 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75 Is Used
Product Size Changeovers
Dial in the exact end-stop for different product lengths on a packaging line, utilizing the 200-275 mm travel window to switch formats in seconds without changing cylinders.
Machine Setup Calibration
Fine-tune the retract position during commissioning to achieve precise mechanical alignment, absorbing tolerance stack-ups without machining custom external stopper blocks.
Variable End-Stop Positioning
Accommodate multiple assembly heights in automated cells by adjusting the stroke on the fly, ensuring delicate parts are pressed accurately using the 1559 N force output.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75 the Right Cylinder?
Select this 63 mm bore when a 50 mm bore yields insufficient thrust (982 N push at 0.5 MPa) but an 80 mm bore is oversized (2513 N). The 75 mm adjustment range is ideal for production lines running multiple product sizes, allowing rapid changeovers via the rear screw rather than physically replacing fixed-stroke SAI cylinders. At a 275 mm stroke, the M16x1.5 rod thread handles standard loads, but an external guide is recommended to prevent excessive side-loading on the unsupported rod.
When specifying a replacement, verify the 63 mm bore, 275 mm nominal stroke, 75 mm adjustment, PT G3/8 port, and required mounting bracket. Remember the rear adjuster acts strictly as a travel stop and does not hold the load without live air; for true pneumatic locking, consider the SAIL or BSAI series instead.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-75 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the 275 mm nominal stroke down to 200 mm. It only sets the end position and does not lock the load without continuous air pressure.
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