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Home/Product Series/AirTAC Sourcing/Rotary Clamp Cylinders/QDK
AirTAC sourcing reference•Rotary Clamp Cylinders
SERIESQDK

AirTAC QDK Horizontal Rotary Clamp Cylinders

QDK own boss and flush front-cover product illustrations
Series product image
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Horizontal rotary clamp cylinders with 90° motion and fixed 5 mm clamping stroke, bores...

Official reference

Based on manufacturer documentation

Model support

For model confirmation

Parts lists

Code, photo, or BOM

Availability / lead time

By model and quantity

Sourcing route & inquiry details

Horizontal rotary clamp cylinders with 90° motion and fixed 5 mm clamping stroke, bores 20/25/32/40 mm. Match left/right rotation, boss/flush front cover, ports and arm-pressure-inertia limits; send model, quantity and destination for quotation.

Know your model? Send it with the quantity for a quote. Not sure? Start with a photo, label or description. We help identify the model and clarify availability and lead time. Mixed parts lists are welcome too.

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AirTAC originalModel matchingChina-source alternative

Find your QDK type

Choose a type; send a model or photo if unsure.

QDK20

Ø20 mm · fixed 5 mm clamp · L/R rotation

QDK25

Ø25 mm · fixed 5 mm clamp · L/R rotation

QDK32

Ø32 mm · fixed 5 mm clamp · L/R rotation

QDK40

Ø40 mm · fixed 5 mm clamp · L/R rotation

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Send the model, quantity and destination. For multiple items, attach a parts list or BOM.

Match a QDK model code

Drawings & dimensions

Installation Drawings & Technical Specifications

Compare installed dimensions
Full View
QDK horizontal rotation zero axial rotation travel and arm mounting overviewClick to open full drawing ↗

QDK horizontal rotation zero axial rotation travel and arm mounting overview

Helpful for Model Matching:

  • Original full code, label, fixture drawing or photo
  • L/R rotation direction and actual angle requirement
  • Bore, 5mm clamping stroke and boss/flush mounting
  • M5 metric or1/8 PT/G port
  • Arm length, mass, inertia and required pressure/speed
  • Quantity, destination and BOM accepted
  • Confirm L/R using official view and retracting clamp sequence
  • Separate90° angle, 0mm rotation stroke and5mm clamp stroke
  • Choose boss orU flush own table
  • 20–32 M5 versus40 PT/G
  • Check arm-length pressure and inertia speed graphs

Catalogue Technical Specifications

AirTAC reference data
Identity / motionDouble-acting horizontal rotary clamp, bores 20/25/32/40. Rotation occurs in the horizontal plane, axial rotation stroke 0 mm; fixed clamping stroke 5 mm. Do not confuse the 5 mm clamp travel with rotation travel.
Direction / angle / repeatabilityL left (anti-clockwise), R right (clockwise), in the illustrated downward/retraction clamping sequence. Nominal 90° rotation; overview direction drawing labels 90°±3°, while specification repeatability is ±2°. These are different published fields, not interchangeable tolerances; confirm actual fixture angle requirement.
Working / proof / mediumAir filtered 40 μm; operating 0.15–1.0 MPa; proof 1.5 MPa is not working. −20 to +70°C; bumper cushion. No universal maximum speed published: arm inertia limits speed.
Ordering / magnet / coverQDK[L/R][20/25/32/40]×5S[U][G only 40]. S with magnet is the only published magnet choice. Front cover blank boss, U flush; these ordinary mounting choices remain family fields. Sensor detail referenced to printed page362, exact sensor not established here.
Ports / thread20/25/32 M5×0.8 metric; 40 1/8. Published pipe thread blank PT or G. Small metric ports use no pipe-thread suffix. No NPT/T or separate thread on M5 inferred.
Published retraction clamp forceIN(Clamp) force table at 0.5 MPa for20/25/32/40: 80.4/168.9/319.5/497.2 N. Source pressure-force table, not full-bore pushing force, not a universal arm-tip force/holding guarantee. Rod sizes12/12/12/16 mm. Values include source-specific pressure offsets; do not replace them with simple bore-area×pressure calculations.
Arm length / pressureUse actual arm length and working pressure within Graph1 operating range. Source 80 mm arm example: QDK20/25 pressure below 0.45 MPa, QDK32/40 below 0.55 MPa. General operating1.0 MPa does not authorize a long arm at that pressure.
Inertia / speedGraph2 relates arm moment of inertia and cylinder average speed. Example at 10⁻³ kg·m²: QDK20/25 below 65.5 mm/s, 32/40 below 120 mm/s. Source says average piston speed=highest speed/1.6. These example speeds apply to the stated inertia only; exact arm inertia and speed need confirmation.
Mounting / arms / drawingsBoss and flush front end caps use their own complete dimensional tables. Compare mounting holes, rod/arm interface and installation envelope. Clamp arm is available by consultation; do not promise an included arm. Use spanner and Allen wrench to fit/remove rocker; do not hold body or cylinder may be damaged.
Materials / installationMaterial table based on a certain bore; piston listed aluminium alloy for 40 and brass for others. Exact-bore materials require confirmation. Remove pipe contaminants, protect against freezing and corrosion, adjust speed with one-way flow control. No air-loss self-locking or retained-load function is established by this source.
Common Model Codes & Configurations:Useful for an RFQ
QDKQDKL20×5SQDKR25×5SUQDKL32×5SU

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Technical reference & selection notes

Ordering Codes, Fit Verification & Specifications

Specifications, installation dimensions, and ordering-code notes.

Ordering code matching

Match each code segment

Send a photo if the code is incomplete

Code format

QDK[L/R][20/25/32/40]×5S[U][G only40]Fixed clamp travel and bore-specific port rule
QDKL20×5SQDKR25×5SUQDKL32×5SUQDKR40×5SU-G
①Direction / bore / clamp stroke②Magnet / cover / port
L left, R right; 20/25/32/40; clamp stroke 5 mm, rotation stroke 0 mm.S required; blank boss/U flush.20–32 metric M5; 40 blank PT/G.

Avoid a wrong match

  • 5mm is clamping travel, not rotation axial travel; rotation stroke is 0.
  • L/R definition follows official view and clamping sequence; do not reverse from an arbitrary installation view.
  • S is required in the published code; a version without magnet is not listed.
  • 20–32 metric M5, only 40 pipe PT/G; no NPT option.
  • Force follows source IN(Clamp) table, not full-bore thrust.
  • Long arm restricts pressure; arm inertia restricts speed.
  • Clamp arm is consultation accessory, not guaranteed included.
  • 90°±3° diagram and ±2° repeatability are separate fields; confirm actual angle needs.

Read the model code

If the label is incomplete, send the readable parts together with a photo.

QDKL32×5SU

①Direction / bore / clamp stroke

L left, R right; 20/25/32/40; clamp stroke 5 mm, rotation stroke 0 mm.

②Magnet / cover / port

S required; blank boss/U flush.20–32 metric M5; 40 blank PT/G.

About QDK

Horizontal rotary clamp cylinders with 90° motion and fixed 5 mm clamping stroke, bores 20/25/32/40 mm. Match left/right rotation, boss/flush front cover, ports and arm-pressure-inertia limits; send model, quantity and destination for quotation.

Matching Questions

Does QDK use5 mm of axial travel while rotating?

No. Rotation is horizontal with zero axial rotation stroke. The separate retraction clamp stroke is5 mm after90° rotation. Compare fixture clearance and the complete clamping sequence.

Can I run a long arm at 1.0 MPa?

The general operating range does not override arm bending and inertia charts. For an 80mm arm the source example requires below 0.45 MPa (20/25) or0.55 MPa (32/40). Send actual arm geometry, mass, inertia, pressure and speed for confirmation.

QDK

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