Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X125SB
The AirTAC Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X125SB is a genuine double-acting COMPACT (thin) air cylinder built to JIS dimensions, with a Ø40mm bore and 125mm 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
- Stroke125 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-ACQ40X125SB
The B02-ACQ40X125SB is a double-acting, single-rod JIS compact cylinder built for welding-line automation. The leading "B02-" prefix marks this as AirTAC's welding-industry dedicated variant of the base ACQ40X125SB, meaning it shares the exact same physical specs—delivering 628.3 N of push force and 527.8 N of pull force at 0.5 MPa—without any altered dimensions or seals. Its short C-clip and riveted body construction drastically reduces axial footprint compared to round-body alternatives.
Because the 125 mm stroke exceeds the 100 mm standard maximum for a Ø40 bore, this unit is configured as a long-stroke, made-to-order variant (extendable up to 300 mm for Ø32-Ø100). It includes a built-in piston magnet (-S) for position sensing and a male-thread piston rod end (-B, M14x1.5) for direct load coupling. Deceleration relies on a fixed NBR elastomer bumper at each end, which is not field-adjustable.
Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X125SB Technical Specifications
| Model | Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X125SB |
|---|---|
| Series | ACQ JIS compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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-ACQ40X125SB
| ACQ | JIS compact (thin) double-acting cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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-ACQ40X125SB Is Used
Robot Spot Welding Guns
Drives the moving electrode on robotic spot welders, utilizing the 628.3 N push force at 0.5 MPa to clamp sheet metal panels securely prior to the weld cycle.
Welding Fixture Clamps
Actuates locating clamps on multi-station welding lines, where the male M14x1.5 rod thread secures custom clamp arms and the 125 mm stroke reaches deep into the fixture.
Automated Part Transfer
Indexes heavy welded sub-assemblies between machining stations, relying on the long-stroke body to clear the weld cell envelope while maintaining a minimal mounting depth.
Is the Airtac B02-ACQ Ultra-Thin Welding Special Cylinder B02-ACQ40X125SB the Right Cylinder?
When sizing this actuator, consider stepping down to a Ø32 bore (providing 402.1 N push at 0.5 MPa) for lighter clamping loads, or moving up to a Ø50 bore (delivering 981.8 N push at 0.5 MPa) if your weld fixture requires greater rigidity. To order, confirm the 40 mm bore, 125 mm non-standard stroke, PT1/8 port, male M14x1.5 rod thread, and the required magnetic switch. Keep in mind that a standard ACQ body does not hold its position if air pressure is lost; the rod will drift, and the fixed bumper only decelerates it near the stroke end. For fail-safe holding in robotic welding cells, integrate an external rod lock or a pilot-operated check valve.
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-ACQ40X125SB 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. Operating pressure ranges from 0.15-1.0 MPa, proof pressure is 1.5 MPa, and the speed range is 30-500 mm/s.
The B02- prefix simply denotes that this is AirTAC's welding-industry dedicated variant of the ACQ40X125SB; it is mechanically identical to the base model. For end-stop deceleration, it uses a fixed NBR elastomer bumper at each end, which is not an adjustable air cushion. For high-energy welding automation, you should add an external shock absorber or slow the approach speed.
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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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