Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S
The AirTAC B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S is a genuine double-acting standard air cylinder with a Ø40mm bore and 120mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ40 mm
- Stroke120 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 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 B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S
The B04-SC40X120S is an AirTAC double-acting tie-rod cylinder delivering 628 N of push force at 0.5 MPa. The leading B04- prefix marks this as a construction-machinery dedicated variant of the SC40X120S, meaning it is mechanically identical to the standard line but designated for heavy-equipment builders. It features a 16 mm rod and a 120 mm stroke.
This model includes a built-in magnet for position sensing and uses adjustable cushions measuring 21 mm to decelerate the piston at stroke ends. Operating on filtered air between 0.15 and 1.0 MPa, it achieves a maximum thrust of 1130 N at 0.9 MPa, making it a robust choice for demanding equipment.
Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S Technical Specifications
| Model | Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 120 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (approx.) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×120 | 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 B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S Is Used
Excavator Doors
Actuates heavy cab doors and access panels on earthmoving equipment where reliable 879 N force at 0.7 MPa is required.
Concrete Dispensers
Drives diverter gates and flow control valves on concrete mixing machinery, benefiting from the magnetic piston for cycle counting.
Loader Linkages
Controls secondary positioning linkages and lockout mechanisms on front-end loaders and telehandlers.
Is the Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S the Right Cylinder?
This 40 mm bore provides 628 N push at 0.5 MPa; step down to a 32 mm bore (402 N) for lighter loads or up to a 50 mm bore (982 N) if you need more force. The 120 mm stroke is standard and falls well within the 1200 mm maximum for this bore. Because the code ends in S, it comes with a magnetic piston ready for CMSG or DMSG sensors.
When replacing this unit, match the 40 mm bore, 120 mm stroke, PT1/4 port thread, basic mounting style, and magnetic piston. For this 120 mm stroke, side loads are moderate, but always ensure proper alignment to prevent rod-bearing wear.
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 B04-SC Construction Machinery Special Standard Cylinder B04-SC40X120S FAQ
The B04- prefix indicates this is AirTAC's construction-machinery dedicated variant of the standard SC40X120S cylinder. It is mechanically identical to the base model, offering the same 40 mm bore, 120 mm stroke, and 1130 N max thrust at 0.9 MPa.
No, the SC series is double-acting and cannot hold position without live air pressure. The adjustable cushion only decelerates the piston at the end of the stroke to soften impact; a mechanical lock or external brake is required to hold loads safely.
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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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