Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40S
The AirTAC SAIJ63X250-40-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 2805N push force at 0.9 MPa and provides a usable travel window of 210 to 250 mm, letting you trim the nominal 250 mm stroke by up to 40 mm. The extruded aluminum barrel includes sensor grooves on both sides, and this variant includes a magnet for position detection.
Equipped with a SUS420J2 stainless steel rod (option A) and PT tapered ports, it is built for durability. The rear adjuster acts purely as a mechanical stop to fine-tune the end position during commissioning without adding external stops. It is not a lock; the cylinder cannot hold a load without live air pressure, so for fail-safe load holding, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAIJ63AX250-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SAIJ63AX250-40S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 210-250 mm window during machine setup, eliminating the need to machine custom spacers for every new product size.
Product Changeover
Quickly adjust the stroke stopper when switching product families on a conveyor line, reducing downtime and ensuring precise mechanical positioning.
Assembly Machine Setup
Fine-tune the end-of-stroke position during commissioning to control pressing or clamping forces accurately without replacing the entire ISO 15552 cylinder.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-40S the Right Cylinder?
Choose this 63 mm bore when you need significantly more thrust than the 50 mm bore (which provides 1767N push at 0.9 MPa) but want to avoid the larger footprint of the 80 mm option. The adjustable stroke is ideal for product changeovers on a line, allowing you to dial in the exact end-stop without swapping the cylinder. Since this is a 250 mm stroke, the 20 mm rod and M16x1.5 thread handle moderate side loads, but for long unsupported strokes, an external guide is recommended to prevent rod wear.
For a true ISO 15552 replacement match, ensure your setup uses a 63 mm bore, 250 mm nominal stroke, 40 mm adjustment range, PT ports, and a magnet for CMSE or DMSE sensors. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR styles found on some other series.
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 SAIJ63AX250-40S FAQ
At an operating pressure of 0.9 MPa, this 63 mm bore cylinder generates a push force of 2805N and a pull force of 1402N. The maximum push force is 318 kgf at 1.0 MPa.
The rear adjusting screw allows you to shorten the effective travel from the 250 mm nominal stroke by up to 40 mm, providing a usable window of 210 to 250 mm. This stopper only sets the travel end and does not lock the load without air pressure.
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 SAIJ63AX250-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.