Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB
The AirTAC Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB is a genuine double-acting COMPACT (thin) air cylinder built to JIS dimensions, with a Ø40mm bore and 250mm stroke, PT1/8 air ports and a C-clip / riveted short body that saves mounting depth. Magnetic-switch slots around the body accept position sensors.
- BoreØ40 mm
- Stroke250 mm
- Port sizePT1/8
- Acting typeDouble acting
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- ConfigurationLong-stroke compact
- 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 B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB
The B02-ACQ40X250SB is a double-acting, single-rod JIS compact cylinder engineered for welding-line automation. The leading "B02-" prefix designates this as AirTAC's welding-industry dedicated variant of the base ACQ40X250SB, meaning it is mechanically identical to the standard model but targeted at fixturing and robot welding cells. It delivers a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa.
This unit features a 250 mm stroke, classifying it as a made-to-order long-stroke variant since it exceeds the 100 mm standard maximum for the 40 mm bore. The C-clip and riveted piston-to-rod assembly minimizes overall axial length, saving valuable mounting depth within tight robotic torch clearance zones. It includes an internal piston magnet (-S) for position sensing and a male-thread piston rod end (-B, M14x1.5) for direct load coupling.
Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB Technical Specifications
| Model | Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB |
|---|---|
| Series | ACQ JIS compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| 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 | Bumper (both ends) |
| Max standard stroke | Up to 100 mm |
Specifications follow the official AirTAC ACQ JIS compact-cylinder datasheet. Confirm against the product label before installation. Port thread: PT (standard); G and NPT available. Rod: female thread (blank) / male thread (B).
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB
| ACQ | JIS compact (thin) double-acting cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| B | Male-thread piston rod (omit = female-thread rod). |
Thread: PT standard (G / NPT available). Related ACQ-family variants: ASQ (single-acting push), ATQ (single-acting pull), ACQD (double rod), ACQJ (adjustable stroke), TACQ (guided / non-rotating).
Where the Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB Is Used
Robot Welding Cell Clamping
Secures mild steel brackets in a robotic MIG station, utilizing the 628.3 N extend force to hold parts firmly against locators while the 250 mm stroke reaches deep into the fixture.
Spot Welding Gun Actuation
Drives the moving electrode of a resistance spot welder, where the short C-clip body saves axial space and the male M14x1.5 rod thread provides a rigid link to the gun tip holder.
Weldment Transfer Conveyor
Pushes completed sub-assemblies out of a welding booth onto a downstream belt, relying on the internal magnet to trigger reed or electronic switches for timed ejection.
Is the Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB the Right Cylinder?
When sizing this actuator, consider stepping down to the 32 mm bore (providing 402.1 N push at 0.5 MPa) for lighter clamping loads, or moving up to the 50 mm bore (offering 981.8 N push at 0.5 MPa) if your weldment requires higher holding force. This 40 mm bore model uses a PT1/8 port and a 16 mm rod diameter.
Because this is a plain compact cylinder, it will not hold its load if air pressure is lost or the valve is centered; the rod will drift, and the fixed NBR elastomer bumper only decelerates the piston near the stroke end. For fail-safe positioning of heavy weldments, incorporate an external rod lock or a pilot-operated check valve. To order, confirm the 40 mm bore, 250 mm stroke, PT1/8 port, built-in magnet (S), and male rod thread (B).
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short-body depth vs. a round-body cylinder
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
- ✓ Side load — avoid on a compact rod
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 short piston rod.
- check Very long strokes are unsuitable for the compact body.
- check Handle the C-clip carefully; seat it fully in its groove.
- check Installation by qualified personnel per AirTAC docs.
Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X250SB FAQ
This 40 mm bore cylinder provides a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. At 0.7 MPa, the push force is 879.6 N, with a maximum push capacity of 128 kgf at 1.0 MPa. The 250 mm stroke exceeds the 100 mm standard maximum for this bore, making it a made-to-order long-stroke variant within the Ø32-Ø100 range.
The B02- prefix indicates this is AirTAC's welding-industry dedicated line of the base ACQ40X250SB; mechanically, it shares the exact same seals, materials, and dimensions as the standard model. For end-stop deceleration, it relies on a fixed NBR elastomer bumper at each end, which is not field-adjustable. For high-speed welding automation, you should slow the approach or add an external shock absorber to manage kinetic energy.
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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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Most inquiries answered within 7-8 hours.
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