Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20SB 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 ACQJ40X45-20SB
The AirTAC ACQJ40X45-20SB is a double-acting JIS compact cylinder featuring an external threaded stop with a 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 completely unaffected. Equipped with a male M14x1.5 piston rod end, it couples directly to your load.
Because the piston area is unchanged, the output force is identical to a standard ACQ of the same bore, delivering 628.3 N push force at 0.5 MPa. The cylinder body integrates fixed elastomer NBR bumpers at each end for end-of-stroke deceleration and includes magnetic-switch grooves. The built-in piston magnet works seamlessly with both reed and electronic solid-state sensors for precise positioning feedback.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20SB |
|---|---|
| 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 ACQJ40X45-20SB
| 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 ACQJ40X45-20SB Is Used
Product Changeover Stops
Quickly dial in the extend position from 25 to 45 mm during packaging line format changes without swapping out the physical cylinder assembly.
Trial End Positions
Perfect for lab testing rigs where the exact extend endpoint needs iterative physical tuning to find the optimal clamping or pressing depth.
Setup-Varying Fixtures
Allows operators to adapt end stops on machining fixtures for varying part lengths directly on the equipment, saving setup time.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X45-20SB the Right Cylinder?
When sizing this 40 mm bore, stepping down to a 32 mm bore yields 402.1 N push at 0.5 MPa, while stepping up to a 50 mm bore provides 981.8 N. If your application never requires stroke adjustments, a standard fixed-stroke ACQ cylinder will suffice. To order this adjustable variant correctly, confirm the 40 mm bore, 45 mm full stroke, 20 mm adjustment window, the -S magnet requirement, and the -B male rod thread. Note that a plain ACQ-type cylinder does not hold its load on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ40X45-20SB FAQ
It delivers 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 full stroke is 45 mm with a 20 mm adjustment window, giving a usable extend range of 25-45 mm. The retract stroke is unaffected.
The external M12x1.25 threaded stop limits the extend stroke length only, meaning the force remains identical to a standard ACQ. It uses fixed elastomer NBR bumpers at each end rather than adjustable air cushions. The built-in magnet (-S) works with reed or electronic solid-state switches.
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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