Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-50
The AirTAC SAIJ125X100-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 100mm travel back by up to 50mm, creating a 50-100mm usable end-position window. Built with a 32mm carbon steel rod and M27x2 rod thread, it delivers 6136N of pull force at 0.5MPa and safely handles high side loads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches.
Unlike a fixed-stroke SAI unit, this model lets you dial in the exact retract stop during commissioning or product changeover without adding external stops. The rear adjuster acts purely as a travel stop and works alongside variable air cushions at both ends to decelerate the load. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and carries a PT tapered port.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 100 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 SAIJ125X100-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×100 | 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 SAIJ125X100-50 Is Used
Product Changeovers
Dial in the exact retract distance on the fly when switching a packaging line to a different carton size.
End-Position Tuning
Fine-tune the 50-100mm travel window during machine setup without swapping out the entire cylinder.
Heavy Assembly Press
Leverage the 6136N pull force to securely seat heavy components, using the rear stop to prevent overtravel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X100-50 the Right Cylinder?
Choose this 125mm bore when you need heavy thrust up to 6136N pull at 0.5MPa; stepping down to a 100mm bore drops the pull force to 3681N. The 50mm adjustment range is perfect for lines running mixed product sizes, letting you fine-tune the retract position on the fly. Since the stroke is 100mm, side load is manageable, but always guide the rod for optimal bearing life.
For exact ISO 15552 replacement matching, verify the 125mm bore, 100mm stroke, 50mm adjustment, PT port, and the specific mounting accessory. Remember that the adjuster is a stop, not a lock; if you need to hold the load without live air pressure, use an external rod lock or pilot-operated check valve.
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 SAIJ125X100-50 FAQ
At 0.5MPa, it provides 6136N of pull force and 8590N of push force. At 0.9MPa, the push force reaches 11045N.
The rear adjuster screw trims the 100mm nominal stroke back by up to 50mm, giving a usable travel window of 50-100mm for precise end-position tuning.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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