Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke300 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40SB
The ACQJ140X300-40SB is a double-acting JIS compact cylinder from AirTAC's big-bore range, featuring a 300mm full stroke and a 140mm bore. An external M27x2.0 threaded stop with a lock nut limits the extend end position, providing a usable forward range of 260 to 300mm. You tune this travel directly on the machinery without swapping parts, while the retract stroke remains completely unaffected.
Because the adjuster only alters stroke length and not piston area, output force stays identical to a standard ACQ of this size. You get 7696.9N push and 7294.8N pull at 0.5MPa. The unit includes a -S piston magnet for reed or solid-state sensors, a -B male M30x1.5 rod end coupling, PT3/8 ports, and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 300 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 ACQJ140X300-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×300 | 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 ACQJ140X300-40SB Is Used
Press Tooling Changeover
Accommodates varying material thicknesses in a large press. The external stop dials in the exact 260-300mm extend position for different dies without changing hardware.
Heavy Fixture Clamping
Secures oversized welded assemblies. The male M30x1.5 rod end mounts directly to heavy clamps, while the adjuster fine-tunes the grip depth on the fly.
Pallet Lift Positioning
Sets precise lower pallet stops in automated material handling. Operators tweak the extend limit to match varying pallet heights directly at the line.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40SB the Right Cylinder?
Selecting this Ø140 model provides massive output, pushing 10775.7N at 0.7MPa. If your application requires slightly less force, dropping to a Ø125 bore yields 6135.9N push at 0.5MPa, whereas stepping up to a Ø160 bore provides 10053.1N push at 0.5MPa. Choose this adjustable variant when you need on-the-fly end-position tuning across a 40mm window; if your machine only needs a fixed depth, a standard ACQ cylinder will suffice. Confirm your ordering essentials: 140mm bore, 300mm full stroke, 40mm window, -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 ACQJ125~160 Adjustable Compact Cylinder ACQJ140X300-40SB FAQ
It delivers 7696.9N push and 7294.8N pull at 0.5MPa, 10775.7N push at 0.7MPa, and a maximum push of 1570 kgf at 1.0 MPa. The full stroke is 300mm, and with the 40mm window, the usable extend range is 260-300mm.
The M27x2.0 threaded stop with lock nut physically limits how far the rod extends, shortening the forward stroke without changing piston area, so force remains identical to a standard ACQ. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions. Note that a plain cylinder will not hold its load on air loss; use an external rod lock for fail-safe holding.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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