Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-50S
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke50 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-50S
The AirTAC ACQJ40X50-50S is a double-acting JIS compact cylinder with a 50mm full stroke and a 50mm adjustable extend window, letting you set the forward end position anywhere from 0 to 50mm. An external M12x1.25 threaded stop and lock nut on the rod-end side limits how far the rod travels forward. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, output force matches a standard ACQ exactly: 628.3N push and 527.8N pull at 0.5MPa. The cylinder body retains its space-saving compact footprint and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration. The included -S piston magnet works with reed or solid-state electronic sensors via the built-in grooves.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-50S Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 50 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 ACQJ40X50-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 ACQJ40X50-50S Is Used
Machining Fixture Clamps
Dial in the exact clamping reach on a CNC fixture during part setup, accommodating varying raw stock thicknesses without machining new stop spacers.
Carton Sealing Stops
Adjust the tucking arm extension depth on a packaging line to handle different carton heights during rapid product changeovers.
Assembly Press Stations
Set precise press-in depths for bearing inserts on a manual assembly line, allowing operators to test multiple end positions before finalizing the mechanical stop.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-50S the Right Cylinder?
If your application needs less thrust, the 32mm bore variant provides 402.1N push at 0.5MPa, whereas stepping up to a 50mm bore yields 981.8N push. Choose this 40mm model when you require 628.3N of push force alongside on-the-fly end-position tuning. If the forward stop point is fixed and never varies, a standard ACQ cylinder without the external adjuster is sufficient. When ordering, verify the 50mm full stroke, the 50mm window, the -S magnet, and the default female M8x1.25 rod-end 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 ACQJ40X50-50S FAQ
The usable extend range is 0-50mm (50mm full stroke minus the 50mm window). Force is identical to a standard ACQ: 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa.
An external M12x1.25 threaded stop with a lock nut limits the forward stroke length only; the retract stroke and piston area are unchanged, so force remains the same. End-of-stroke deceleration is handled by fixed NBR elastomer bumpers, not an adjustable air cushion. For high cycle speeds, consider adding an external shock absorber.
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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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