Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 20mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke20 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10S
The ACQJ40X20-10S is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the EXTEND end position. You can fine-tune the extend stroke on the machine from 10mm up to the full 20mm without swapping parts, while the RETRACT stroke remains completely unaffected. The external adjuster utilizes an M12x1.25 thread.
Because the piston area stays the same, the output force is identical to a standard ACQ of this 40mm bore. The unit includes a built-in piston magnet (-S) for position sensing, compatible with reed or electronic solid-state switches. It runs on PT1/8 porting, carries a fixed NBR elastomer bumper at each end for end-of-stroke deceleration, and operates at speeds of 30-500 mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 20 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 ACQJ40X20-10S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 ACQJ40X20-10S Is Used
Machining Fixture Changeover
Dial in the extend position from 10 to 20mm when swapping part fixtures on a CNC loading station, avoiding the need to machine custom spacer rings.
Carton Flap Folding Stops
Adapt the push depth on a packaging line for varying box heights, using the external lock nut to quickly set the exact folding contact point.
Assembly Press Trials
Test different end positions for a pressing operation during product setup, safely limiting the extend distance to prevent damaging delicate components.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X20-10S the Right Cylinder?
Choosing this 40mm bore yields 628.3N push and 527.8N pull at 0.5MPa. If your application requires less force, stepping down to a 32mm bore provides 402.1N push, whereas moving up to a 50mm bore offers 981.8N push. A fixed-stroke ACQ suffices if your end position never varies, but this adjustable model is essential for varying fixtures. Confirm ordering essentials: 40mm bore, 20mm full stroke, 10mm window, -S magnet, and the default female M8x1.25 rod-end 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 ACQJ40X20-10S FAQ
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. The full stroke is 20mm, but the external adjuster allows the usable extend range to be shortened to 10mm, while the retract stroke stays fixed at 20mm.
No, the adjuster only changes the extend length, not the piston area, so force remains identical to a standard ACQ. Deceleration is handled by a fixed elastomer bumper at each end, not an adjustable air cushion. For high-speed or high-energy loads, use an external shock absorber or slow the approach.
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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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