Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-30SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke50 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 ACQJ20X50-30SB
The AirTAC ACQJ20X50-30SB 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 20 mm up to the full 50 mm on the machine, shortening the stroke by up to 30 mm without swapping parts. The retract stroke remains completely unaffected. Because the piston area stays the same, output force is identical to a standard ACQ of this bore.
This model includes a male M8x1.25 piston rod end for direct load coupling and a built-in piston magnet for position sensing. It retains the fixed elastomer bumper at each end and operates at speeds from 30 to 500 mm/s. The M8x1.25 adjuster thread allows precise mechanical positioning without altering the 157.1 N push force at 0.5 MPa.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-30SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 50 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 ACQJ20X50-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 ACQJ20X50-30SB Is Used
Machining Fixture Stops
Dial in the exact extend end position on a CNC fixture to accommodate varying raw material thicknesses without machining new stop blocks.
Carton Forming Turrets
Adjust the pusher end point on the fly during product changeover to handle different package sizes on the same sealing line.
Trial Positioning Probes
Set trial end positions for testing sensor engagement distances on automated assembly equipment before finalizing hard stops.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-30SB the Right Cylinder?
When sizing this 20 mm bore actuator, stepping down to a 16 mm bore reduces the 0.5 MPa push force to 100.5 N, while stepping up to a 25 mm bore increases it to 245.4 N. If your application never requires stroke length adjustments, a fixed-stroke ACQ cylinder provides the same holding force in a simpler package. To order this adjustable version correctly, confirm the 20 mm bore, 50 mm full stroke, 30 mm adjustment window, the -S magnet for electronic or reed switches, 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 ACQJ20X50-30SB FAQ
It provides a 157.1 N push and 117.8 N pull at 0.5 MPa, a 219.9 N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa. The full stroke is 50 mm with a 30 mm adjustable window, yielding a usable extend range of 20-50 mm.
The external M8x1.25 threaded stop with lock nut mechanically limits the extend stroke, allowing on-machine tuning without changing the piston area, so force remains identical to a standard ACQ. The retract stroke is unaffected, and the fixed elastomer bumpers decelerate the motion at both ends.
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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