Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 25mm 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
- Stroke25 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20S
The AirTAC SAIJ63X25-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a built-in magnet (-S) for position sensing and a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance. With a nominal 25 mm stroke and a 20 mm adjustment range, it provides a highly precise 5 to 25 mm usable travel window for exact end-position tuning.
Operating at 0.15 to 1.0 MPa, this 63 mm bore generates 1559 N of push force at 0.5 MPa. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position without adding external stops. It uses a PT tapered port and includes adjustable air cushions at both ends to absorb kinetic energy across its 30 to 800 mm/s speed range.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 25 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 SAIJ63AX25-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×25 | 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 SAIJ63AX25-20S Is Used
Precision Clamping
Dial in the exact 5 to 25 mm clamping distance to accommodate varying part thicknesses on the same fixture without changing cylinders.
Machine Changeover
Quickly adjust the retract stop during product line changeovers to set new end-of-stroke positions for different assembly dimensions.
Sensor Setup
Leverage the built-in magnet with CMSE or DMSE switches to confirm exact end positions after mechanically tuning the stroke.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20S the Right Cylinder?
Choose this adjustable model when a fixed 25 mm stroke cannot accommodate part tolerances or machine changeover, allowing you to dial in the exact retract distance on the fly. If your application requires less force, stepping down to a 50 mm bore yields 982 N at 0.5 MPa; if you need more clamping power, an 80 mm bore provides 2513 N. The rear adjuster and air cushions only decelerate the load, so for position holding without live air pressure, select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead.
As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting footprints. The correct SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Ensure your pneumatic setup pairs the -S magnet with AirTAC CMSE (reed) or DMSE (electronic) sensors for reliable switching.
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 SAIJ63AX25-20S FAQ
At 0.5 MPa, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. It can deliver up to 2182 N of push force at 0.7 MPa.
The rear adjuster is a mechanical stop that lets you trim the effective stroke back by up to 20 mm. With the 25 mm nominal stroke, this creates a usable travel window of 5 to 25 mm for fine-tuning end positions.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.