Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-20SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-20SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 100mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke100 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 ACQJ20X100-20SB
The AirTAC ACQJ20X100-20SB is a double-acting JIS compact cylinder with a 20 mm bore and 100 mm full stroke. An external M8x1.25 threaded stop and lock nut limit the extend end position, giving a usable forward range of 80 to 100 mm. The return stroke remains fixed at its original length. Because the piston area stays constant, output force equals a standard ACQ of this size.
This unit includes a male M8x1.25 rod end for direct load coupling and a built-in piston magnet for position sensing. It operates at 30 to 500 mm/s and relies on fixed TPU elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-20SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-20SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 100 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 ACQJ20X100-20SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×100 | 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 ACQJ20X100-20SB Is Used
Machine Tending Setup
Dial in the exact extend endpoint during initial commissioning of a lathe loading arm without machining new spacers.
Product Changeover Stops
Quickly reposition the forward stop from 100 mm down to 80 mm on a packaging line when switching to a smaller carton size.
Assembly Fixture Trial
Test different pressing depths on an electronics assembly fixture by turning the external stop nut to find the optimal result.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-20SB the Right Cylinder?
Choosing this 20 mm bore yields 157.1 N push and 117.8 N pull at 0.5 MPa. If your application requires less force, stepping down to a 16 mm bore provides 100.5 N push, while moving up to a 25 mm bore offers 245.4 N push. A fixed-stroke ACQ is sufficient if you never need to alter the forward endpoint. Confirm your requirements for bore, 100 mm full stroke, 20 mm adjuster window, the 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 ACQJ20X100-20SB FAQ
It has a 20 mm bore, 100 mm full stroke, and a 20 mm adjustment window, giving a usable extend range of 80-100 mm. 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. The port is M5x0.8.
The external M8x1.25 threaded stop with lock nut mechanically limits how far the rod extends, shortening the stroke without changing the piston area, so force remains unchanged. The cylinder uses fixed elastomer bumpers, not adjustable cushions. It will not hold a load on air loss, so use an external rod lock 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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