Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke70 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB
The AirTAC ACQJ40X70-40SB is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut to precisely limit the extend stroke. You can fine-tune the forward end position on the machine, yielding a usable extend range of 30 to 70 mm. The retract distance remains completely unaffected by this adjustment.
Because the piston area stays constant, output force is identical to a standard ACQ of the same bore, delivering 628.3 N push and 527.8 N pull at 0.5 MPa. This 40 mm bore unit uses a 16 mm rod with an M14x1.5 male thread (-B) for direct load coupling. It includes a piston magnet (-S) compatible with reed or solid-state switches, and relies on a fixed NBR elastomer bumper at each end for end-of-travel deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 70 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 | M8×1.25 (F) / M14×1.5 (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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB Is Used
Multi-Part Machining Clamps
Dial in the extend position from 30 to 70 mm on a CNC fixture when switching between raw stock heights, avoiding the need to machine custom spacer rings.
Carton Forming Stops
Adjust the folding flap contact point on the fly for various box formats, using the M14x1.5 male rod thread to drive the pressing plate directly.
Assembly Press Trial
Safely test different pin insertion depths on an automated line by backing off the external M12x1.25 adjuster nut before finalizing the mechanical cycle.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB the Right Cylinder?
If your setup requires less thrust, the 32 mm bore offers 402.1 N push at 0.5 MPa, whereas stepping up to a 50 mm bore yields 981.8 N. Choose this 40 mm bore when you need roughly 628 N of push force combined with on-site extend-position tuning. If the forward stop point never varies, a fixed-stroke ACQ cylinder is sufficient. To order, confirm the 40 mm bore, 70 mm full stroke, 40 mm adjuster window, the -S magnet for sensors, 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X70-40SB FAQ
It provides 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa. The full stroke is 70 mm with a 40 mm adjustable window, giving a usable extend range of 30 to 70 mm.
No, the external stop only changes travel length; the piston area remains the same, so force is identical to a standard ACQ. End-of-stroke deceleration is handled by a fixed NBR elastomer bumper at each end, not an adjustable air cushion.
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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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