Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB
The ACQJ40X300-100SB is a double-acting JIS compact cylinder built for long-stroke, made-to-order applications requiring precise extend positioning. It features a 300mm full stroke and an external M12x1.25 threaded stop with a lock nut, allowing you to fine-tune the extend end position within a 200 to 300mm usable range without swapping parts. The retract stroke remains completely unaffected.
Because the adjuster only limits travel length, the piston area stays the same, delivering force identical to a standard ACQ of this bore. You get 628.3N push and 527.8N pull at 0.5MPa, with a maximum push capacity of 128kgf at 1.0MPa. This variant includes a male M14x1.5 rod end for direct load coupling, a built-in piston magnet for electronic or reed sensors, and fixed NBR elastomer bumpers at both ends.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 |
| Rod thread | M8×1.25 (F) / M14×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
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 | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB Is Used
Machining Center Changeovers
Adapts clamping extensions on CNC fixtures rapidly during product family changeovers, using the external stop to dial in the exact 200-300mm reach without machining new spacers.
Woodworking Press Setup
Allows operators to test varying end positions for pressing heads on assembly lines, finding the optimal material compression point before finalizing the mechanical setup.
Carton Forming Adjustments
Provides trial end positions for folding mechanisms when switching carton sizes, letting technicians turn the M12x1.25 adjuster to shorten the extend stroke for smaller formats.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB the Right Cylinder?
When sizing this unit, consider that the 40mm bore provides 628.3N push force at 0.5MPa. Stepping down to a 32mm bore drops push force to 402.1N, while moving up to a 50mm bore increases it to 981.8N. If your machine never requires end-position tuning, a fixed-stroke ACQ cylinder will suffice. For this adjustable configuration, confirm your ordering essentials: 40mm bore, 300mm full stroke, 100mm adjustment window, the S magnet option, and the B male rod thread.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-100SB FAQ
This cylinder has a 40mm bore, a 300mm full stroke, and a 100mm adjustment window, giving a usable extend range of 200-300mm. It delivers 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke, while the retract stroke stays fixed. The adjuster changes travel length only, so force remains identical to a standard ACQ. The cylinder uses fixed NBR bumpers, not a lock; for fail-safe load holding on air loss, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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