Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X125-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X125-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X125-50S
The AirTAC SAIJ63X125-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa. By integrating a 50 mm adjustment range, this model allows you to dial back the 125 mm nominal stroke, creating a precise 75 to 125 mm usable travel window for highly tailored machine movements.
This unit features a standard carbon steel rod and a PT tapered port thread. The -S designation means it includes a magnet for position sensing, supporting AirTAC CMSE reed and DMSE electronic solid-state switches housed within the dual-side sensor grooves on the extruded aluminum barrel. The rear stopper acts purely as a travel end deceleration point, so live air is required to maintain load position.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X125-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X125-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAIJ63X125-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SAIJ63X125-50S Is Used
Product Size Changeover
Quickly adapt a packaging line to different carton sizes by dialing the stroke back from 125 mm to 75 mm without swapping the cylinder.
Variable End-Stop Setup
Establish a precise, repeatable end-of-travel position during machine commissioning using the 50 mm rear adjustment screw.
Deceleration Tuning
Combine the adjustable mechanical stop with the standard variable air cushion to safely slow down loads at the end of the stroke.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X125-50S the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore provides insufficient thrust (982 N push at 0.5 MPa) but an 80 mm bore is excessive (2513 N push at 0.5 MPa). The 50 mm adjustment window is significantly larger than typical 10 or 20 mm trims, making it ideal for applications requiring major product-size changeovers rather than minor commissioning tweaks. To replace an ISO 15552 cylinder, match the 125 mm stroke, 50 mm adjuster, PT port, and -S magnet.
Because the nominal stroke is 125 mm, an external guide is not strictly mandated, but the 20 mm rod diameter and M16x1.5 rod thread handle side loads well. Remember that the rear adjuster is a stop, not a lock; if you need to hold a load without continuous air pressure, consider the AirTAC SAIL or BSAI series instead. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ63X125-50S 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 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to shorten the 125 mm nominal stroke by up to 50 mm, providing an effective travel window of 75 to 125 mm. The adjuster acts as a mechanical stop and does not lock the load without live air.
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