Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
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SMC
21-CDU
SMC 21-CDU — 10-11-21-22-CDU Double Acting Single Rod Clean Room
The SMC 21-CDU is an official catalog model of the CU Free Mount Cylinder featuring a Clean Series designation of 21 for the relief type, copper, fluorine, and silicon-free construction with low particle generation. This unit includes a built-in magnet, bore sizes ranging from 6mm to 25mm, and stroke lengths from 5mm to 50mm, with options for various solid-state or reed auto switches, lead wire lengths, and quantities per set. Submit the exact part number, quantity, and application requirements to receive an accurate quote for this SMC component.
Request pricing and availabilityCommercial response within one business day for your destination and required quantity.
Request a QuoteWhy no listed price?
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued SMC references — within one business day.
- Manufacturer
- SMC
- Part number
- 21-CDU
- Product series
- CU Free Mount Cylinder
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 21-CDU.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Product Series
- CU Free Mount Cylinder
- Configuration Status
- Official catalog model
- Clean Series
- 10 (Relief Type), 11 (Vacuum Suction Type), 21 [Relief Type (Copper, Fluorine and Silicon-free + Low Particle Generation)], 22 [Vacuum Suction Type (Copper, Fluorine and Silicon-free + Low Particle Generation)]
- -
- -
- C
- C
- Magnet
- None, D (Built-in)
- U
- U
- Bore Size
- 6mm, 10mm, 16mm, 20mm, 25mm
- Stroke
- 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm
- D
- D
- Auto Switch
- No Switch, M9B--Solid State, Gen. Purpose, 2 Wire, Horizontal, M9N--Solid State, Gen. Purpose, 3 Wire NPN, Horizontal, M9P--Solid State, Gen. Purpose, 3 Wire PNP, Horizontal, M9BV--Solid State, Gen. Purpose, 2 Wire, Vertical, M9NV--Solid State, Gen. Purpose, 3 Wire NPN, Vertical, M9PV--Solid State, Gen. Purpose, 3 Wire PNP, Vertical, M9BW--Solid State, 2-color Indication, 2 Wire, Horizontal, M9NW--Solid State, 2-color Indication, 3 Wire NPN, Horizontal, M9PW--Solid State, 2-color Indication, 3 Wire PNP, Horizontal, M9BWV--Solid State, 2-color Indication, 2 Wire, Vertical, M9NWV--Solid State, 2-color Indication, 3 Wire NPN, Vertical, M9PWV--Solid State, 2-color Indication, 3 Wire PNP, Vertical, A90--Reed, AC Volt, Horizontal, A90V--Reed, DC Volt, AC Volt, Vertical, A93--Reed, DC Volt, AC Volt, LED, Horizontal, A93V--Reed, DC Volt, AC Volt, LED, Vertical, A96--Reed, DC Volt, LED, Horizontal, A96V--Reed, DC Volt, LED, Vertical
- Lead Wire or Prewired Connector
- 0.5m (Or None in the Case of No Switch), M (1m), L (3m), Z (5m), SC (0.3m Cord Length, M12-4 Pin Connector, 3 & 4 Out), SAPC (0.5m Cord Length, M8-3 Pin Connector), SBPC (0.5m Cord Length, M8-4 Pin Connector), SDPC (0.5m Cord Length, M12-4 Pin Connector), MAPC (1.0m Cord Length, M8-3 Pin Connector), MBPC (1.0m Cord Length, M8-4 Pin Connector), MDPC (1.0m Cord Length, M12-4 Pin Connector)
- Number
- 2 pcs. (Or None in the Case of No Switch), 3 pcs, 4 pcs, S (1 pc.)
Engineering context
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against SMC 21-CDU. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.