Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40B
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40B 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 ACQJ20X100-40B
The AirTAC ACQJ20X100-40B is a double-acting JIS compact cylinder featuring a 100mm full stroke and a male-thread piston rod (M8x1.25) for direct load coupling. An external threaded stop with a lock nut restricts the extend travel, providing a usable forward range of 60 to 100mm. The retract distance remains totally unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ of the same bore, yielding 157.1N push and 117.8N pull at 0.5MPa. The unit integrates fixed elastomer bumpers at both ends rather than adjustable air cushions, and operates at speeds from 30 to 500mm/s. Although this specific configuration ships without a magnet, the body retains magnetic-switch grooves for adding sensors later.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40B Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40B |
|---|---|
| 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 ACQJ20X100-40B
| 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 ACQJ20X100-40B Is Used
Product Changeover Stops
Adapt extending push distances instantly on a machining line when switching between part families, using the lock nut to set the new end position without disassembling the tooling.
Carton Flap Folding
Dial in the exact folding tab contact point for varying box dimensions on a packaging conveyor, ensuring crisp folds without reordering cylinders for each carton size.
Prototype Positioning
Establish precise trial end stops during laboratory testing of new assembly mechanisms, safely limiting the 60-100mm extend range while proving motion profiles.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-40B the Right Cylinder?
If your application requires less push force at 0.5MPa, the 16mm bore delivers 100.5N, whereas stepping up to the 25mm bore provides 245.4N for heavier demands. A fixed-stroke ACQ is sufficient if your end position never varies, but this ACQJ variant excels where setup-varying fixtures need on-the-fly length tuning. When ordering, confirm the 20mm bore, 100mm total stroke, 40mm adjuster window, the male rod thread, and whether you need the -S magnet option for position 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 ACQJ20X100-40B FAQ
At 0.5MPa it generates 157.1N push and 117.8N pull, with a 219.9N push at 0.7MPa and a maximum push of 32kgf at 1.0MPa. The usable extend range is 60-100mm (100mm full stroke minus the 40mm window). It features a 10mm rod, an M5x0.8 port, an M8x1.25 male rod thread, and an M8x1.25 external adjuster thread.
No, the external threaded stop only shortens the extend stroke length; the piston area is unchanged, so force remains identical to a standard ACQ. Deceleration is handled by fixed elastomer bumpers at each end, not adjustable air cushions. Note that this model lacks a -S sensor magnet, and a plain cylinder will not hold its load on air loss without an external rod lock.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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