Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X20-20SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X20-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 20mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke20 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 ACQJ20X20-20SB
The AirTAC ACQJ20X20-20SB 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 0 up to 20 mm directly on your machinery without swapping parts. The retract stroke remains completely unaffected by this adjustment.
Because the 20 mm piston area is unchanged, the output force is identical to a standard ACQ, yielding 157.1 N push at 0.5 MPa. The unit includes a male M8x1.25 piston rod end for direct load coupling, a built-in magnet for electronic or reed sensors, and fixed elastomer bumpers. The standard PT threaded M5x0.8 port keeps pneumatic connections compact.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X20-20SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X20-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 20 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 ACQJ20X20-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×20 | 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 ACQJ20X20-20SB Is Used
Machining Fixture Stops
Dial in the exact extend position from 0 to 20 mm on a machining fixture to accommodate varying raw material thicknesses without manufacturing new stop blocks.
Carton Changeover Flaps
Adjust the extend stroke on the fly during packaging line product changeovers to interact with different carton dimensions precisely.
Prototype Press Testing
Safely test trial end positions on a small assembly press, backing off the extend stroke incrementally to verify contact force before finalizing the mechanical setup.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X20-20SB the Right Cylinder?
When sizing this unit, consider the neighbouring bores: a 16 mm bore yields 100.5 N push, while a 25 mm bore provides 245.4 N push at 0.5 MPa. If your application requires a fixed 20 mm extend and retraction without any on-machine end-position tuning, a standard ACQ20X20-SB will suffice. To order this adjustable version correctly, confirm the 20 mm bore, 20 mm full stroke, 20 mm adjustable window, the -S magnet option, and the -B male rod 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 ACQJ20X20-20SB FAQ
The 20 mm bore yields 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 full stroke is 20 mm with a 20 mm adjustable window, giving a usable extend range of 0-20 mm. It uses an M8x1.25 external adjuster thread.
No, the external threaded stop only limits how far the rod extends; it does not alter the piston area, so the force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers at both ends for deceleration, and the included -S magnet works with reed or 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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