Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X250S
The AirTAC B04-SC Construction Machinery Special Standard Cylinder B04-SC40X250S is a genuine double-acting standard air cylinder with a Ø40mm bore and 250mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ40 mm
- Stroke250 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-SC40X250S
The B04-SC40X250S is an AirTAC double-acting tie-rod cylinder built for construction machinery. The B04- prefix marks it as the heavy-equipment dedicated variant of the SC40X250S, meaning it is mechanically identical to the standard line with a 40mm bore and 250mm stroke.
Delivering 628N of push force at 0.5 MPa and 1130N at 0.9 MPa, it handles robust actuation tasks. The S suffix adds a built-in piston magnet for position sensing, while the 16mm rod and 21mm adjustable cushion absorb end-of-stroke impacts.
Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X250S Technical Specifications
| Model | Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X250S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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-SC40X250S
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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-SC40X250S Is Used
Heavy Equipment Doors
Actuates access panels and heavy doors on excavators and loaders where a 250mm stroke and 879N output at 0.7 MPa are required.
Boom Mechanism Locking
Drives secondary locking pins or safety catches in articulated boom mechanisms using integrated magnetic position feedback.
Dust Filter Cleaning
Cycles shaker arms or reverse pulse valves on site dust extractors, relying on the adjustable cushion to soften impacts.
Is the Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X250S the Right Cylinder?
Step down to a 32mm bore if your application only requires 402N at 0.5 MPa, or step up to a 50mm bore for 982N at 0.5 MPa. For this 250mm stroke, watch for side-load bending on the 16mm rod; use an external guide rail or a guided cylinder to prevent rod-bearing wear.
When replacing this unit, match five points: the 40mm bore, 250mm stroke, PT1/4 port thread, basic mounting style, and the built-in magnet (-S).
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-SC40X250S FAQ
The B04- prefix designates this as a construction-machinery dedicated variant of the SC40X250S. It is mechanically identical to the standard SC40X250S cylinder, offering the same 40mm bore, 250mm stroke, and 1130N thrust at 0.9 MPa.
No, it is a double-acting cylinder and cannot hold position without live air pressure. The adjustable cushion only decelerates the piston near stroke ends. A mechanical lock or external rod brake is required to hold loads safely.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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