Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 35mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke35 mm
- Port sizeM5×0.8
- Adjuster threadM8×1.25
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B
The AirTAC ACQJ20X35-40B is a double-acting JIS compact cylinder with a 35 mm full stroke and a 40 mm external adjustment window. An external threaded stop with a lock nut limits the extend end position, providing a usable forward range of 0 to 35 mm. The retract distance remains completely unaffected. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
This bore 20 unit features a 10 mm piston rod and a male M8x1.25 rod-end thread that couples directly to your load. It delivers 157.1 N of push force and 117.8 N of pull force at 0.5 MPa. The body incorporates fixed elastomer TPU bumpers at each end for end-of-stroke deceleration and includes sensor grooves, though this specific SKU ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 35 mm |
| Adjuster thread | M8×1.25 |
| Port size | M5×0.8 |
| 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 | M5×0.8 (F) / M8×1.25 (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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B Is Used
Machining Fixture Stops
Dial in the exact extend position for varying part heights on a CNC machining fixture without machining new stop collars.
Package Changeover Diverter
Adjust the extend stroke on a packaging conveyor diverter to handle different carton widths during rapid product changeovers.
Prototype Press End-Point
Set trial end positions safely on a small pneumatic press, tweaking the extend distance in real-time to find the optimal crimp depth.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B the Right Cylinder?
When specifying this bore 20 actuator, consider the next size down (bore 16, 100.5 N push) or up (bore 25, 245.4 N push) at 0.5 MPa to match your load requirements. If your application requires a fixed forward position and no on-machine tuning is necessary, a standard ACQ cylinder will suffice. To order this adjustable version correctly, confirm the 20 mm bore, 35 mm full stroke, 40 mm window, the male M8x1.25 rod thread, and that no magnet is required.
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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X35-40B FAQ
The usable extend range is 0 to 35 mm (35 mm full stroke minus the 40 mm window). The retract stroke is unaffected. Force is identical to a standard ACQ: 157.1 N push and 117.8 N pull at 0.5 MPa, 219.9 N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa.
The external M8x1.25 threaded stop with a lock nut limits the extend distance only, meaning the force is unchanged. Fixed elastomer TPU bumpers decelerate the rod near stroke ends. This plain cylinder does not hold its load on air loss; for a fail-safe hold, use an external rod lock or pilot-operated check valve.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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