Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50B is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke75 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 ACQJ20X75-50B
The AirTAC ACQJ20X75-50B is a double-acting JIS compact cylinder featuring an external threaded stop and lock nut that limits the extend end position. With a full stroke of 75 mm and a 50 mm adjustment window, you can fine-tune the usable extend range from 25 mm up to 75 mm directly on the machine without swapping parts. The retract stroke remains completely unaffected by this mechanism.
Because the adjuster only restricts travel length and not piston area, output force stays identical to a standard ACQ of this bore. At 0.5 MPa it delivers 157.1 N of push force and 117.8 N of pull force. This bore 20 unit includes a male M8x1.25 rod-end thread for direct load coupling, fixed elastomer bumpers for end-of-stroke deceleration, and a standard M5x0.8 port. The body features sensor grooves, though this specific SKU ships without a magnet.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50B |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 75 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 ACQJ20X75-50B
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 ACQJ20X75-50B Is Used
Machining Fixture Clamping
Dial in the exact clamping extension on a CNC fixture without machining custom spacers, accommodating varying raw material thicknesses on the fly.
Carton Forming Stops
Adjust the pusher end position rapidly during packaging line changeovers to handle different box depths while maintaining consistent retraction.
Assembly Press Trial
Set trial end positions for a light-duty press operation, safely testing the 25-75 mm extend range before finalizing the mechanical stop depth.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50B the Right Cylinder?
Selecting this bore 20 unit is ideal when your application requires precise extend-position tuning within a 25-75 mm range. If you do not need variable end stops, a fixed-stroke ACQ cylinder is sufficient and more economical. For higher force requirements, stepping up to a bore 25 model increases push force to 245.4 N at 0.5 MPa; conversely, scaling down to a bore 16 unit drops push force to 100.5 N. Confirm your ordering essentials: 20 mm bore, 75 mm full stroke, 50 mm window, male M8x1.25 rod thread, and no magnet.
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 ACQJ20X75-50B FAQ
The usable extend range is 25-75 mm (75 mm full stroke minus the 50 mm window). Force is identical to a standard ACQ: 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.
An external M8x1.25 threaded stop with a lock nut limits the extend travel, changing stroke length only without altering pneumatic force. The cylinder uses fixed elastomer bumpers for deceleration rather than adjustable air cushions. While the body has sensor grooves, this specific model ships without a magnet.
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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