Airtac SC50 Standard Cylinder SC50X125H
The AirTAC Airtac SC50 Standard Cylinder SC50X125H is a genuine double-acting standard air cylinder with a Ø50mm bore and 125mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ50 mm
- Stroke125 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SC50 Standard Cylinder SC50X125H
The SC50X125H is a double-acting pneumatic cylinder with a 50 mm bore and 125 mm stroke, factory-equipped with Viton (FKM) seals for reliable operation in high-temperature environments up to 150 °C. Its 20 mm diameter piston rod and PT1/4 port deliver a push force of 982 N at 0.5 MPa, scaling to 1767 N at the maximum operating pressure of 0.9 MPa.
This tie-rod cylinder uses an adjustable air cushion (21 mm length) to decelerate the piston quietly at stroke end. The body length A is 150 mm, giving a total extended length of approximately 275 mm. It is a genuine AirTAC SC-series unit, built for demanding thermal conditions where standard seals would degrade.
Airtac SC50 Standard Cylinder SC50X125H Technical Specifications
| Model | Airtac SC50 Standard Cylinder SC50X125H |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| 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, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (approx.) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SC50 Standard Cylinder SC50X125H
| SC | Standard tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SC50 Standard Cylinder SC50X125H Is Used
Hot Press & Molding
Viton seals allow the SC50X125H to actuate clamps and ejectors inside heated platen presses, thermoforming tools, and composite curing stations where ambient temperatures exceed 70 °C.
Autoclave & Sterilization
Withstands repeated steam sterilization cycles and hot-air autoclave environments up to 150 °C, making it suitable for medical device manufacturing and laboratory automation.
Foundry & Kiln Actuation
Operates gates, dampers, and diverters near furnaces, kilns, and drying ovens. The FKM seal material resists hardening and cracking from radiant heat and hot airborne particulates.
Is the Airtac SC50 Standard Cylinder SC50X125H the Right Cylinder?
Choose the SC50 bore for mid-range clamping, pressing, or ejection tasks needing up to 982 N at standard plant air. If your force requirement exceeds 1500 N, step up to the SC63 bore (1559 N push at 0.5 MPa); for lighter, faster cycling, the SC40 bore provides 628 N. The 125 mm stroke is a standard length within the SC50's 1200 mm maximum.
For direct replacement, match five points: 50 mm bore, 125 mm stroke, PT1/4 port thread, basic mount (no bracket), and no magnet. The Viton seal variant (H suffix) is essential if the original cylinder runs above 70 °C or in chemically aggressive air streams.
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 SC50 Standard Cylinder SC50X125H FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At 0.7 MPa, push force rises to 1374 N. The maximum operating force at 0.9 MPa is 1767 N. These values are based on the 50 mm bore and 20 mm rod diameter.
Yes, the H suffix designates Viton (FKM) seals, which shift the operating temperature range from -20–70 °C (TPU) to 0–150 °C. Ensure the port thread (PT) and basic mounting match your existing setup. The mechanical dimensions, forces, and cushion are identical to the standard SC50X125.
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