Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20S 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 ACQJ40X300-20S
The ACQJ40X300-20S is a double-acting JIS compact cylinder built for applications requiring a long, made-to-order 300mm stroke with on-machine extend position tuning. An external M12x1.25 threaded stop and lock nut lets you shorten the forward stroke by up to 20mm, yielding a usable extend range of 280-300mm. The retract stroke remains completely unaffected by this adjustment. Because the piston area stays constant, output force is identical to a standard ACQ of the same bore, delivering 628.3N push at 0.5MPa.
This long-stroke variant includes a built-in piston magnet (-S) for position sensing and uses a fixed elastomer NBR bumper at each end for end-of-stroke deceleration. It features a 16mm piston rod, a female M8x1.25 rod-end thread, and a PT1/8 port. Operating pressure ranges from 0.15 to 1.0MPa, with a proof pressure of 1.5MPa and a speed range of 30-500mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20S |
|---|---|
| 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 ACQJ40X300-20S
| 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 ACQJ40X300-20S Is Used
Long-Reach Clamping
Ideal for woodworking machines needing a 280-300mm extend to clamp varying timber widths without swapping tooling.
Product Changeover Stops
Quickly dial in the extend limit on packaging lines when shifting between different carton depths using the external lock nut.
Prototype Positioning
Test trial end positions on new automated assembly fixtures, fine-tuning the forward stroke by up to 20mm on the machine.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-20S the Right Cylinder?
When sizing this unit, consider the 40mm bore alongside its neighbors: a 32mm bore yields 402.1N push, while a 50mm bore provides 981.8N push at 0.5MPa. If your extend endpoint never varies, a fixed-stroke ACQ cylinder is sufficient. To order, confirm the 40mm bore, 300mm full stroke, 20mm adjuster window, the -S magnet, and your required rod-end thread. Note that this 300mm stroke exceeds the 100mm standard maximum for this bore, classifying it as a long-stroke configuration.
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 ACQJ40X300-20S FAQ
The usable extend range is 280-300mm (300mm 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 external M12x1.25 threaded stop limits the extend stroke without altering piston area, so force remains unchanged. The retract stroke is unaffected. It uses fixed elastomer bumpers for deceleration, and the -S magnet works with both reed and solid-state electronic switches.
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1-Year Warranty
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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