Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-20S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke70 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 ACQJ20X70-20S
The AirTAC ACQJ20X70-20S is a double-acting JIS compact cylinder featuring an external M8x1.25 threaded stop with a lock nut. This mechanism limits the extend end position, providing a usable extend range of 50 to 70 mm from the 70 mm full stroke. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, the output force is identical to a standard ACQ bore 20 cylinder, delivering 157.1 N push and 117.8 N pull at 0.5 MPa. The body uses fixed elastomer bumpers at both ends for end-of-stroke deceleration and includes a built-in piston magnet for position sensing.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-20S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 70 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 ACQJ20X70-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×70 | 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 ACQJ20X70-20S Is Used
Machining Fixture Stops
Dial in the exact extend end position during a new product-changeover on a CNC load line without machining custom stop collars.
Carton Sealing Pressure
Adjust the extend depth on a packaging line to accommodate different box heights, ensuring consistent sealing pressure without tooling changes.
Assembly Press Tunning
Set trial end positions on an assembly press for delicate component insertion, fine-tuning the 50-70 mm stroke window directly on the machine.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-20S the Right Cylinder?
If you need slightly less push force, the bore 16 ACQJ offers 100.5 N push at 0.5 MPa, while the larger bore 25 ACQJ provides 245.4 N if your load requires more strength. A fixed-stroke ACQ cylinder is sufficient if your extend end position never requires on-machine tuning. To order this adjustable version correctly, confirm the 20 mm bore, 70 mm full stroke, 20 mm adjustment window, the -S magnet option, and the default female M5x0.8 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-20S FAQ
The usable extend range is 50-70 mm (70 mm full stroke minus the 20 mm window). The 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 lock nut mechanically limits how far the rod extends, shortening the stroke without changing the piston area or force. The cylinder uses fixed elastomer bumpers, not adjustable air cushions. The included -S magnet works with both reed and 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 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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