Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-30SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 45mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke45 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 ACQJ20X45-30SB
The AirTAC ACQJ20X45-30SB is a double-acting JIS compact cylinder featuring an external extend stop. A threaded screw with a lock nut lets you fine-tune the forward end position on the machine, yielding a usable extend range of 15-45mm from the 45mm full stroke. The retract stroke remains completely unaffected.
Because the piston area stays constant, output force equals a standard ACQ: 157.1N push and 117.8N pull at 0.5MPa. This bore 20 unit includes a male M8x1.25 rod end for direct load coupling and a built-in magnet for position sensing. It uses fixed elastomer bumpers rather than adjustable air cushions.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-30SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 45 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 ACQJ20X45-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-30SB Is Used
Machining Fixture Clamping
Dial in the exact clamping reach on a CNC fixture by turning the M8x1.25 adjuster, accommodating different raw material thicknesses without changing tooling.
Carton Forming Stops
Adjust the forward push-off distance on a packaging line during product size changeovers, ensuring precise folding without reprogramming motion controllers.
Assembly Press Trial
Set trial end positions when seating delicate bearings on an assembly press, allowing operators to safely reduce the extend stroke by up to 30mm on the fly.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-30SB the Right Cylinder?
Select this 20mm bore if your setup requires varying the extend endpoint within a 15 to 45mm window without swapping cylinders. If you only need a fixed 45mm forward stroke, a standard ACQ20X45 is sufficient. For higher energy cycles, consider adding an external shock absorber since the bumpers are fixed. When ordering, confirm the 45mm stroke, 30mm window, S magnet, and B male rod thread. If you need less force, the 16mm bore provides 100.5N push at 0.5MPa; stepping up to the 25mm bore yields 245.4N push.
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 ACQJ20X45-30SB FAQ
It delivers 157.1N push and 117.8N pull at 0.5MPa, 219.9N push at 0.7MPa, and a maximum push of 32kgf at 1.0MPa. The full stroke is 45mm with a 30mm adjustable window, giving a usable extend range of 15-45mm.
The external M8x1.25 threaded stop with lock nut limits only the extend length, meaning force remains identical to a standard ACQ since piston area is unchanged. The cylinder uses fixed elastomer bumpers and does not hold the load on air loss; for fail-safe holding, install an external rod lock.
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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