Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40SB 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 ACQJ20X45-40SB
The AirTAC ACQJ20X45-40SB is a double-acting JIS compact cylinder with a 45mm full stroke and a 40mm adjustable extend window, yielding a usable forward range of 5-45mm. An external M8x1.25 threaded stop with a lock nut lets you set the extend end position directly on the machine without swapping parts. The return stroke remains fixed at 45mm and is completely unaffected by the adjuster.
Because the piston area is unchanged, output force is identical to a standard ACQ of the same bore, delivering 157.1N push and 117.8N pull at 0.5MPa. This bore 20mm unit uses a 10mm rod, M5x0.8 port, and a fixed elastomer bumper at each end. The -S magnet enables detection via reed or solid-state switches, while the -B male M8x1.25 rod end couples directly to your load.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40SB |
|---|---|
| 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 ACQJ20X45-40SB
| 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 ACQJ20X45-40SB Is Used
Product Changeover Stops
Quickly dial in new forward end positions on a machining fixture when swapping part families, using the external stop to shorten the 45mm stroke by up to 40mm.
Packaging Tucking Arms
Fine-tune the flap-folding reach on a cartoner without replacing the cylinder, ensuring precise contact even as carton sizes vary.
Trial End Positions
Establish optimal pressing depth on a lab test rig by adjusting the extend stop on the fly, relying on the fixed elastomer bumper for end-of-stroke deceleration.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-40SB the Right Cylinder?
If you need less push force, the bore 16mm ACQJ provides 100.5N push at 0.5MPa; if you need more, stepping up to the bore 25mm yields 245.4N push. A fixed-stroke ACQ is sufficient if your end position never varies. To order this unit correctly, confirm the 20mm bore, 45mm full stroke, 40mm adjuster window, and the -S magnet and -B male rod options.
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 ACQJ20X45-40SB 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 usable extend range is 5-45mm (a 45mm full stroke minus the 40mm window), and the adjuster changes stroke length only, leaving force unchanged from a standard ACQ.
An external M8x1.25 threaded stop with a lock nut limits the forward stroke, while the retract stroke is unaffected. The -S magnet works with reed or electronic solid-state switches for positioning. The unit uses fixed elastomer bumpers, so for fail-safe load holding on air loss you must add 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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