Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20 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 SAIJ63AX25-20
The AirTAC SAIJ63X25-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 5 to 25 mm, allowing you to dial in the exact retract position without swapping hardware. Operating at 0.5 MPa, it delivers 1559 N of push force and 1402 N of pull force.
This configuration uses a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It features PT tapered port threads (G3/8), operates at speeds of 30-800 mm/s, and includes adjustable air cushions at both ends to protect your machinery during these short, rapid movements.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20 |
|---|---|
| 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 SAIJ63AX25-20
| 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 SAIJ63AX25-20 Is Used
Short-Stroke Clamping
Dial in the exact 5 to 25 mm clamping depth for delicate workpieces, preventing deformation while securing the part firmly.
Machine Commissioning
Fine-tune the retract end-position during initial setup without machining new spacer plates or changing the cylinder.
Product Changeover
Quickly adjust the stroke window on packaging lines when switching to a slightly different product size.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX25-20 the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore falls short on power (delivering only 982 N push at 0.5 MPa) but you still need a compact 25 mm stroke. The integrated 20 mm adjustment range is ideal for fine-tuning end stops during machine commissioning or product changeover, eliminating the need for external stopper blocks. For holding loads without live air pressure, note that this adjuster is a travel stop, not a lock; you would need an AirTAC SAIL or BSAI cylinder for that function.
When replacing an ISO 15552 cylinder, verify the 63 mm bore, 25 mm stroke, 20 mm adjustment range, G3/8 PT ports, and your required mounting style. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, but omits FB, CA, CB, and CR brackets. Because the stroke is under 300 mm, side-load stress on the 20 mm rod is minimal, though external guides are always recommended for heavy radial loads.
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 SAIJ63AX25-20 FAQ
At a standard operating pressure of 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw lets you mechanically shorten the effective stroke by up to 20 mm. This creates a usable travel window of 5 to 25 mm, allowing precise end-position tuning at commissioning without adding external stops.
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 SAIJ63AX25-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.