Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 650mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke650 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-100S
The AirTAC SAIJ125X650-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 550-650 mm usable travel window from the 650 mm nominal stroke, allowing precise end-position tuning during commissioning. Fitted with a SUS420J2 stainless steel rod and a -S magnet, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic sensors via the dual-side extruded barrel grooves.
Delivering 6136 N push force at 0.5 MPa, this bore uses a G1/2 port and operates at 30-500 mm/s. The rear adjuster acts purely as a travel stop to decelerate the load, not as a lock. For load-holding without live air, SAIL or BSAI cylinders are required. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 650 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×650 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX650-100S Is Used
Variable End-Position Tuning
Dial in the 550-650 mm travel window during machine commissioning to fine-tune end stops without swapping cylinders.
Product Size Changeover
Adjust the rear stop quickly on packaging lines accommodating different product lengths without adding external stops.
Heavy-Duty Positioning
Leverage 6136 N of thrust to move heavy fixtures while utilizing the 100 mm adjustment range for precise alignment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX650-100S the Right Cylinder?
Select this 125 mm bore when a 100 mm bore yielding 3927 N is insufficient, but a 160 mm bore providing 10053 N is excessive. The adjustable 550-650 mm stroke is chosen over a fixed SAI cylinder when setups require variable end-stops or product changeovers without adding external stops. To replace an ISO 15552 cylinder, match the 125 mm bore, 650 mm stroke, 100 mm adjust, PT G1/2 port, and -S magnet.
With a 650 mm stroke, the M27x2 rod thread and 32 mm rod diameter handle high side loads, but an external guide is recommended for unsupported lengths. The SAIJ mounting set omits FB, CA, CB, and CR brackets.
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 SAIJ125 Adjustable Cylinder SAIJ125AX650-100S FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 1251 kgf at 1.0 MPa.
The rear adjuster allows you to shorten the 650 mm nominal stroke by up to 100 mm, creating a 550-650 mm usable travel window. It acts as a stop, not a lock.
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