Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X100-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X100-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 100mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke100 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X100-20SB
The AirTAC ACQJ40X100-20SB is a double-acting, JIS-compact cylinder with an external threaded stop and lock nut on the extend side. This mechanism lets you fine-tune the extend end position directly on the machine, providing a usable extend range of 80-100mm (a 20mm adjustment window off the 100mm full stroke). The retract stroke remains completely unaffected by this modification.
Because the piston area stays constant, output force is identical to a standard ACQ of the same bore. The 40mm bore generates 628.3N push and 527.8N pull at 0.5MPa, utilizing a 16mm rod with an M14x1.5 male thread (-B) for direct load coupling. It features a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and includes a built-in piston magnet (-S) compatible with reed or electronic solid-state switches.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X100-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X100-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 100 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 ACQJ40X100-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 ACQJ40X100-20SB Is Used
Machining Fixture Stops
Dial in the exact 80-100mm extend stop on a CNC machining fixture without machining new spacers or swapping cylinders during part setup changes.
Carton Sealing Turrets
Adjust the extend endpoint on packaging turrets to accommodate different carton sizes on the fly, ensuring precise flap folding pressure.
Press Sub-assembly Probing
Set trial end positions on light-duty vertical press probes, using the fixed elastomer bumper to absorb the 879.6N peak push force at 0.7MPa.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X100-20SB the Right Cylinder?
For 0.5MPa push requirements around 628.3N, this 40mm bore is ideal; stepping down to a 32mm bore drops push to 402.1N, while moving up to a 50mm bore raises it to 981.8N. If your application never requires altering the extend endpoint, a fixed-stroke ACQ cylinder is simpler and sufficient. When ordering, verify the 100mm full stroke, 20mm window, -S magnet for sensing, and -B male rod thread (M14x1.5). Note that a plain ACQ-type cylinder will not hold a load on air loss; add an external rod lock or pilot-operated check valve for fail-safe holding.
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 ACQJ40X100-20SB FAQ
At 0.5MPa it provides 628.3N push and 527.8N pull; at 0.7MPa push is 879.6N, with a maximum push of 128kgf at 1.0MPa. The usable extend range is 80-100mm (20mm window off the 100mm full stroke). The 16mm rod uses an M14x1.5 male thread, the port is PT1/8, and the external adjuster thread is M12x1.25.
No, the external stop only limits how far the rod extends, leaving the piston area untouched, so force remains identical to a standard ACQ. The retract stroke is also unaffected. Deceleration is handled by a fixed NBR elastomer bumper at each end, and the -S magnet works with reed or electronic solid-state switches.
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Related AirTAC ACQJ Compact Cylinders
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