Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50B 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 ACQJ20X50-50B
The AirTAC ACQJ20X50-50B is a double-acting JIS compact cylinder with a 50 mm full stroke and a male M8x1.25 piston rod end. An external M8x1.25 threaded stop equipped with a lock nut lets you restrict the forward extend position. You get a usable extend span of 0 up to 50 mm, while the retract stroke remains completely unaffected.
Because the piston area stays constant, output force mirrors a standard ACQ unit: 157.1 N push and 117.8 N pull at 0.5 MPa. The body incorporates fixed elastomer bumpers for end-of-travel deceleration and features integrated magnetic-switch grooves. Operating pressure spans 0.15 to 1.0 MPa, with a speed range of 30-500 mm/s.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50B |
|---|---|
| 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 ACQJ20X50-50B
| 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 ACQJ20X50-50B Is Used
Machining Fixture Stops
Dial in the exact extend position for varying raw material widths on a milling fixture without machining custom spacers.
Product Changeover Diverter
Reposition a conveyor diverting gate for different carton lengths on the fly by turning the external stopper nut.
Sealing Head Setup
Find the ideal sealing head height on a packaging line through trial end positions before locking the stroke down.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50B the Right Cylinder?
If 117.8 N pull at 0.5 MPa is insufficient, stepping up to the 25 mm bore yields 188.9 N pull, whereas dropping to a 16 mm bore provides 75.4 N pull. If your end position never varies, a fixed-stroke ACQ20 cylinder is simpler. When ordering this adjustable variant, verify the 50 mm full stroke, the 50 mm adjustment window, the male M8x1.25 rod thread, and whether you need the -S magnet option for sensing.
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 ACQJ20X50-50B 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 50 mm with a 50 mm window, allowing a usable extend range of 0-50 mm. The retract stroke is unaffected.
An external M8x1.25 threaded stop with a lock nut limits the extend length, changing only the stroke distance while keeping the force identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for deceleration rather than adjustable air cushions. This model ships without a magnet, but the body retains sensor grooves for adding a reed or solid-state switch if needed.
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
Request a Quote for Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.