Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke40 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB
The AirTAC ACQJ140X40-40SB is a double-acting JIS compact cylinder engineered for big-bore tasks, featuring an external threaded stop and lock nut that limits the extend end position. With a full stroke of 40 mm and a 40 mm adjustment window, you can fine-tune the usable extend range from 0 to 40 mm directly on your machinery. The retract stroke remains completely unaffected by this mechanism. A male M30x1.5 rod-end thread (-B) couples directly to your load, while the PT3/8 port handles pneumatic supply.
Because the internal piston area stays constant, output force is identical to a standard ACQ of this bore. At 0.5 MPa, it delivers 7696.9 N of push force and 7294.8 N of pull force, peaking at a 1570 kgf maximum push at 1.0 MPa. The integrated magnet (-S) pairs with reed or electronic solid-state switches, and fixed NBR elastomer bumpers absorb impact at both ends without requiring adjustable air cushions.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 40 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| 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 | M22×2.5 (F) / M30×1.5 (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 (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×40 | 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 0 to 40 mm extend position during heavy press changeovers without machining new spacer blocks or swapping cylinders.
Large Fixture Positioning
Fine-tune the forward clamp location on large machining fixtures to accommodate varying part dimensions directly on the machine.
Assembly Press Trial
Establish the precise bottoming-out height on automated assembly presses during prototype runs, relying on the 1570 kgf max push to seat components.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB the Right Cylinder?
When sizing this 140 mm bore unit, consider the neighboring bore sizes for your force requirements. Dropping to a 125 mm bore yields 6135.9 N push at 0.5 MPa, whereas stepping up to a 160 mm bore provides 10053.1 N push. If your application never requires end-position adjustments, a fixed-stroke ACQ cylinder provides the same holding power in a simpler package. To order this adjustable variant, confirm the 140 mm bore, 40 mm full stroke, 40 mm window, the -S magnet for sensing, and the -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 ACQJ125~160 Adjustable Compact Cylinder ACQJ140X40-40SB FAQ
This cylinder provides 7696.9 N push and 7294.8 N pull at 0.5 MPa, and 10775.7 N push at 0.7 MPa. The maximum push is 1570 kgf at 1.0 MPa. The full stroke is 40 mm with a 40 mm adjustable window, allowing a usable extend range of 0 to 40 mm.
The external M27x2.0 threaded stop with lock nut limits only the extend length, leaving retract unaffected and keeping force identical to a standard ACQ. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions. Note that a plain compact cylinder does not hold its load on air loss; for fail-safe holding, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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