Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 80mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke80 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20SB
The AirTAC ACQJ40X80-20SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend end position. With a full stroke of 80mm and an adjustment window of 20mm, you can fine-tune the usable extend range from 60mm up to 80mm directly on the machine. The retract stroke remains completely unaffected by this mechanism.
Because the piston area is unchanged, the output force is identical to a standard ACQ of the same bore, delivering 628.3N push and 527.8N pull at 0.5MPa. This bore includes a male M14x1.5 rod-end thread (-B) for direct coupling, a built-in magnet (-S) for position sensing, and fixed NBR elastomer bumpers at each end for shock absorption. The standard PT1/8 port and 16mm rod keep the body compact while operating at speeds from 30 to 500mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 80 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 ACQJ40X80-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 ACQJ40X80-20SB Is Used
Machining Fixture Clamps
Dial in the exact clamping reach on a CNC mill during setup. The 60-80mm extend range lets operators accommodate varying part heights without machining custom spacer blocks.
Packaging Line Diverters
Adjust the stroke end position for different carton widths on a packaging conveyor. The external stop allows quick changeover without swapping out the entire cylinder assembly.
Assembly Press Stops
Set trial end positions for pressing bearings into housings. The male M14x1.5 rod couples directly to the tooling, while the lock nut secures the exact 60-80mm extend depth against vibration.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X80-20SB the Right Cylinder?
If 628.3N push at 0.5MPa is excessive, stepping down to a 32mm bore yields 402.1N, whereas a 50mm bore provides 981.8N for heavier demands. If the exact 80mm end position is permanently fixed and never requires on-the-fly shifting, a standard ACQ40X80 cylinder will suffice without the external adjuster. When ordering this adjustable variant, confirm the 40mm bore, 80mm full stroke, 20mm window, the male M14x1.5 rod thread (-B), and the magnet option (-S) for switch readiness.
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 ACQJ40X80-20SB FAQ
The usable extend range is 60-80mm (80mm full stroke minus the 20mm window). Force is identical to a standard ACQ: 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. The retract stroke remains the full 80mm.
An external M12x1.25 threaded stop with a lock nut limits how far the rod extends, changing only the stroke length without altering the piston area or force. The -S built-in magnet works with both reed and electronic solid-state switches. Fixed NBR bumpers decelerate the load at the ends, though a plain cylinder will not hold its load on air loss without an external rod lock.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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