Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50SB 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 ACQJ20X45-50SB
The AirTAC ACQJ20X45-50SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut to limit the extend end position. With a 45 mm full stroke and a 50 mm adjustment window, you can fine-tune the usable extend range from 0 up to 45 mm directly on the machine. The retract stroke remains completely unaffected by this mechanism.
Because the piston area is unchanged, output force is identical to a standard ACQ of the same bore, delivering 157.1 N push at 0.5 MPa. This unit includes a male M8x1.25 piston rod end for direct load coupling and a built-in magnet for position sensing. It uses fixed elastomer bumpers for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50SB |
|---|---|
| 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 ACQJ20X45-50SB
| 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 ACQJ20X45-50SB Is Used
CNC Fixture Positioning
Dial in the exact clamping extend distance on a CNC machining fixture without machining new spacers or swapping components.
Carton Size Changeover
Rapidly adapt sealing head or flap folding stops on packaging lines when transitioning between different corrugated box formats.
Prototype Stroke Trials
Safely test varying extend end points on prototype assembly rigs to determine optimal mechanical push depth before finalizing a design.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X45-50SB the Right Cylinder?
For sizing, dropping to a bore 12 yields 56.5 N push, while stepping up to a bore 25 provides 245.4 N at 0.5 MPa. Choose this 20 mm bore if 157.1 N is your target. If your equipment never requires altering the end position, a fixed-stroke ACQ20 cylinder is sufficient. When ordering this adjustable variant, confirm the 45 mm full stroke, 50 mm window, S magnet, and 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 ACQJ20X45-50SB FAQ
It provides 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 45 mm with a 50 mm window, allowing a usable extend range of 0-45 mm.
An M8x1.25 external threaded stop and lock nut mechanically limits the extend distance, changing only the stroke length, not the force. The cylinder uses fixed elastomer bumpers instead of air cushions. It will not hold a load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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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