Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 45mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke45 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20
The AirTAC ACQJ40X45-20 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 usable extend range from 25 mm up to the full 45 mm directly on the machine, while the retract stroke remains unaffected. Because the piston area is unchanged, force equals a standard ACQ of this bore.
This 40 mm bore unit delivers 628.3 N push and 527.8 N pull at 0.5 MPa, with a maximum push capacity of 128 kgf at 1.0 MPa. It features a 16 mm rod, PT1/8 port, fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration, and sensor grooves ready for reed or solid-state switches. The external adjuster uses an M12x1.25 thread.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 45 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 ACQJ40X45-20
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×45 | 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 ACQJ40X45-20 Is Used
Machining Fixture Positioning
Dial in the exact clamping reach on a machining fixture during setup, adjusting the extend endpoint by up to 20 mm without swapping cylinder hardware.
Product Changeover Stops
Accommodate varying package lengths on a conveyor line by tuning the extend stroke from 25 to 45 mm to hit different mechanical stop positions.
Packaging Machine Probing
Test and set trial end positions for sealing or folding heads on packaging equipment, fine-tuning the stroke length to match product heights precisely.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20 the Right Cylinder?
If you need less force, the 32 mm bore provides 402.1 N push at 0.5 MPa; stepping up to the 50 mm bore yields 981.8 N push. If your application never requires altering the extend endpoint, a fixed-stroke ACQ cylinder is sufficient. When ordering this adjustable model, confirm the 40 mm bore, 45 mm full stroke, 20 mm window, female M8x1.25 rod-end thread, and note this unit ships without a magnet.
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 ACQJ40X45-20 FAQ
The usable extend range is 25-45 mm (a 20 mm window off the 45 mm full stroke). Force is identical to a standard ACQ: 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The retract stroke is unaffected.
An external M12x1.25 threaded stop with a lock nut limits the extend stroke length only, leaving piston area and force unchanged. The cylinder uses fixed NBR elastomer bumpers at each end, not adjustable air cushions. As a plain double-acting cylinder, it will not hold a load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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