Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20S 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 SAIJ63AX275-20S
The AirTAC SAIJ63X275-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel to a 255-275 mm window. It delivers a 0.5 MPa pull force of 1402 N, utilizing a 20 mm diameter piston rod with an M16x1.5 thread. The -S variant includes a magnet for position sensing and uses an SUS420J2 stainless steel rod.
Instead of bolting on external stops during product changeovers, the integrated rear screw lets you fine-tune the retract end-position at commissioning. This adjustable stop sets the travel limit but does not lock the load without live air pressure; for dead-piston holding, consider an external pilot-operated check valve or the SAIL lock series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20S |
|---|---|
| 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 SAIJ63AX275-20S
| 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 SAIJ63AX275-20S Is Used
Machine Changeovers
Dial in the 255-275 mm travel window during product size transitions without swapping out the entire cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stop at commissioning to perfect material feeding or clamping accuracy, absorbing mechanical tolerance stack-ups.
Variable Diverting
Adjust the retract distance on the fly to handle different package sizes on a sorting line, using DMSE electronic sensors to verify the trimmed stroke.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20S the Right Cylinder?
Choose this 63 mm bore when you need higher thrust than a 50 mm bore (825 N pull at 0.5 MPa) but want to avoid the larger footprint of an 80 mm option. The PT tapered port and G3/8 threading match standard ISO 15552 pneumatic plumbing. An adjustable stroke is ideal for machines requiring variable end-stops, whereas a fixed SAI cylinder suits rigidly repeated travel.
For any stroke near or exceeding 300 mm, side-load risks increase; even with a robust 20 mm rod and M16x1.5 thread, an external guide rail is recommended to prevent binding. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB and CA styles. The integrated magnet supports CMSE reed and DMSE electronic sensors for precise end-of-stroke confirmation.
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 SAIJ63AX275-20S FAQ
The rear adjuster screw lets you shorten the 275 mm nominal stroke by up to 20 mm, providing a usable travel window of 255-275 mm. It acts as a mechanical stop for end-position tuning and is not a lock.
At 0.5 MPa, it provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
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