Airtac SAIJ50 Adjustable Cylinder SAIJ50AX40-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX40-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 40mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 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 SAIJ50 Adjustable Cylinder SAIJ50AX40-20
The AirTAC SAIJ50X40-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 40 mm nominal stroke that can be fine-tuned down by up to 20 mm, creating a highly flexible 20-40 mm usable travel window. Delivering 982 N of push force at 0.5 MPa, it is built with a SUS420J2 stainless steel rod and PT tapered ports.
This adjustable-stop design allows you to dial in the exact retract end position during commissioning without swapping hardware. The rear screw acts purely as a travel stop and works alongside the standard variable air cushions to decelerate the load; it does not hold the load without live air. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX40-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX40-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX40-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×40 | 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 SAIJ50 Adjustable Cylinder SAIJ50AX40-20 Is Used
Product Changeovers
Quickly adjust the 20-40 mm travel window to accommodate slight variations in part sizes on a manufacturing line without changing the cylinder.
End-Position Tuning
Fine-tune the retract stop during machine setup to achieve exact positioning, preventing hard mechanical crashes.
Short-Stroke Clamping
Ideal for clamping delicate components where the 982 N force and a precisely dialed-back stroke prevent over-travel damage.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX40-20 the Right Cylinder?
Choose this 50 mm bore when you need more thrust than the 40 mm version (628 N push at 0.5 MPa) but want a compact footprint. The adjustable 20-40 mm travel window is perfect for applications requiring variable end stops during product changeovers, eliminating the need to bolt on external stops or buy a fixed-stroke SAI cylinder. It is dimensionally interchangeable per ISO 15552.
When ordering, confirm the 50 mm bore, 40 mm stroke, 20 mm adjustment, PT ports, and SUS420J2 rod material. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since it lacks a magnet, it does not support CMSE or DMSE sensors without modification.
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 SAIJ50 Adjustable Cylinder SAIJ50AX40-20 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. It can reach up to 1767 N push force at 0.7 MPa.
The rear adjuster screw allows you to shorten the 40 mm nominal stroke by up to 20 mm, providing a usable travel window of 20 to 40 mm. The adjuster acts as a mechanical stop and does not lock the load without air pressure.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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