Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50S 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 ACQJ20X50-50S
The AirTAC ACQJ20X50-50S is a double-acting JIS compact cylinder with a 20mm bore and 50mm full stroke. An external M8x1.25 threaded stop and lock nut restricts the extend end position, providing a usable forward range of 0-50mm. The return stroke remains fixed at its original 50mm length. Because the piston area is unchanged, output force matches a standard ACQ exactly.
This model includes the -S piston magnet for reed or solid-state electronic switches. It uses an M5x0.8 port and a 10mm rod with a female M5x0.8 end thread. Fixed elastomer bumpers handle end-of-stroke deceleration without requiring manual cushion adjustment.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50S |
|---|---|
| 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 ACQJ20X50-50S
| 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 ACQJ20X50-50S Is Used
Machining Fixture Clamping
Dial in the exact clamping depth on a CNC milling vise without machining custom spacers for each new part.
Packaging Diverter Arm
Adjust the pusher stroke length on the fly to handle varying carton widths on a packaging line.
Assembly Press Stroke
Fine-tune the press end-position for inserting bearings to prevent over-travel during product changeovers.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50S the Right Cylinder?
If your setup needs less push, the 16mm bore provides 100.5N at 0.5MPa, whereas the 25mm bore yields 245.4N for heavier demands. A standard fixed-stroke ACQ is sufficient if your end position never varies. To order this adjustable unit correctly, verify the 20mm bore, 50mm full stroke, 50mm window, -S magnet, and female M5x0.8 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 ACQJ20X50-50S FAQ
Force is identical to a standard ACQ: push is 157.1N and pull is 117.8N at 0.5MPa, push is 219.9N at 0.7MPa, and max push is 32kgf at 1.0MPa. The full stroke is 50mm, and with the 50mm window, the usable extend range is 0-50mm.
An external M8x1.25 threaded screw with a lock nut limits forward travel, shortening the extend stroke without altering piston area or force. Fixed elastomer bumpers decelerate the rod at both ends, and the built-in -S magnet works with reed or solid-state electronic switches.
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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