Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-40S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 35mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke35 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-40S
The AirTAC ACQJ40X35-40S is a double-acting JIS compact cylinder with a 40mm bore and 35mm full stroke. It features an external threaded stop with a lock nut on the rod-end side, allowing you to fine-tune the extend end position on the machine. The usable extend range runs from 0mm up to 35mm, while the retract stroke remains completely unaffected.
Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore, delivering 628.3N push at 0.5MPa. The cylinder uses a fixed elastomer bumper at each end for deceleration and includes a built-in piston magnet (-S) for position sensing. The standard port size is PT1/8, and the piston rod measures 16mm in diameter.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-40S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 35 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 ACQJ40X35-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×35 | 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 ACQJ40X35-40S Is Used
Machining Fixture Stops
Dial in the extend position from 0 to 35mm on a CNC lathe loader without machining new spacer rings for different part lengths.
Carton Changeover Flaps
Quickly alter the folding arm end-point during packaging line size changeovers, using the external M12x1.25 stopper to set the exact 35mm travel.
Assembly Press Trials
Test multiple engagement depths on an assembly press by adjusting the extend stroke in the field, relying on the fixed elastomer bumper to absorb end impacts.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X35-40S the Right Cylinder?
For sizing context, stepping down to a 32mm bore yields 402.1N push at 0.5MPa, while moving up to a 50mm bore provides 981.8N. This 40mm model fits squarely in the middle for medium-force tasks. If your end position never varies, a fixed-stroke ACQ cylinder is sufficient; choose this ACQJ variant only when setup-varying stops or product-changeover positions require on-the-fly adjustment. When ordering, confirm the 40mm bore, 35mm full stroke, 40mm adjustable window, the -S magnet, and the default female M8x1.25 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 ACQJ40X35-40S FAQ
The usable extend range is 0-35mm (35mm full stroke minus the 40mm window). The retract stroke is unaffected. Force equals 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 external adjuster uses an M12x1.25 thread.
No, the external stop limits stroke length only; it does not alter piston area, so force remains identical to a standard ACQ. The cylinder uses a fixed elastomer bumper, not an adjustable air cushion. Note that a plain ACQ does not hold its load on air loss; for a fail-safe hold, use an external rod lock or pilot-operated check valve. The -S magnet works with reed or solid-state switches.
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Related AirTAC ACQJ Compact Cylinders
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