CNC Controllers

Showing 73 - 96 of 1897 products

$0.00

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Buy the Siemens 6FC3471-1AC-Z - a genuine Siemens industrial automation component engineered for reliable performance in demanding manufacturing and process control environments. The Siemens 6FC3471-1AC-Z is a direct drop-in replacement for existing installations and ships ready for integration.

Siemens 6FC5357-0BB33-0AA0 Siemens

$8,315.89

Only 3 units left

SINUMERIK 840D/DE NCU 573.3, 650 MHZ, 64 MB WITHOUT SYSTEM SOFTWARE MEMORY: NC 2.5 MB, PLC 96 KB PREPARED FOR PROFIBUS DP, ACCORD. TO IEC 61508

Siemens 6FC5250-5BX30-3AH0 Siemens

$475.90

Only 3 units left

Product
Article Number (Market Facing Number)	6FC52505BX303AH0 \| 6FC52505BX303AH0
Product Description	*spare part* SINUMERIK 840D CNC software 12-5 on PC card; standard Software version 5.3; single license
Product family	Not available
Product Lifecycle (PLM)	PM500:Discontinued Product or end of PLM & Support
Additional Product Information
EAN	4025515017578
UPC	Not available
Commodity Code	85235190
LKZ_FDB/ CatalogID	NC60E
Product Group	9302
Group Code	R2S1
Country of origin	Germany
SCIP number	Not available
Delivery information
Net Weight (lb)	0.220 lb
Package size unit of measure	Not available
Packaging Quantity	1

Siemens 6FC5203-0AF01-0AA1 Siemens

$2,865.59

Only 5 units left

Buy the Siemens 6FC5203-0AF01-0AA1 - a genuine Siemens industrial automation component engineered for reliable performance in demanding manufacturing and process control environments. The Siemens 6FC5203-0AF01-0AA1 is a direct drop-in replacement for existing installations and ships ready for integration.

Siemens 6FC9344-1WY00-1AF0 Siemens

$744.00

Only 1 unit left

Product
Article Number (Market Facing Number)	6FC93441WY001AF0 \| 6FC93441WY001AF0
Product Description	SIGNAL CABLE, PREASSEMBLED (POSITION ENCODER 6FC9320-3K. ) MAIN SPINDLE PULSE ENCODER 6FC9320-3KB, LENGTH (M)= 0 + 0 + 5 + 0
Product family	Not available
Product Lifecycle (PLM)	PM500:Discontinued Product or end of PLM & Support
Additional Product Information
EAN	Not available
UPC	Not available
Commodity Code	85444290
LKZ_FDB/ CatalogID	NCZ
Product Group	9306
Group Code	R2S3
Country of origin	Slovakia
SCIP number	Not available
Delivery information
Net Weight (lb)	2.019 lb
Package size unit of measure	Not available
Packaging Quantity	1

Siemens 6FC5370-5AA20-0AA0 Siemens

$0.00

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Buy the Siemens 6FC5370-5AA20-0AA0 - a genuine Siemens industrial automation component engineered for reliable performance in demanding manufacturing and process control environments. The Siemens 6FC5370-5AA20-0AA0 is a direct drop-in replacement for existing installations and ships ready for integration.

Siemens 6FC5370-3AT03-0CA0 Siemens

$3,780.25

Only 5 units left

PLC Direct is not an authorized distributor. We offer a broad range of in-stock products with minimal lead time.

Siemens 6FC3984-7CE Siemens

$0.00

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Product
Article Number (Market Facing Number)	6FC39847CE
Product Description	SINUMERIK 810M OPERATOR PANEL W. MONOTOR, W/O CIRCUIT BOARDS
Product family	Not available
Product Lifecycle (PLM)	PM500:Discontinued Product or end of PLM & Support
Additional Product Information
EAN	Not available
UPC	Not available
Commodity Code	Not available
LKZ_FDB/ CatalogID	NC.810E
Product Group	Not available
Group Code	R211
Country of origin	Not available
SCIP number	Not available
Delivery information
Net Weight (lb)	Not available
Package size unit of measure	Not available
Packaging Quantity	Not available

Siemens 6FC9320-5DC Siemens

$673.52

Only 3 units left

Buy the Siemens 6FC9320-5DC - a genuine Siemens industrial automation component engineered for reliable performance in demanding manufacturing and process control environments. The Siemens 6FC9320-5DC is a direct drop-in replacement for existing installations and ships ready for integration.

Siemens 6FC3853-0KA-Z Siemens

$0.00

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PLC Direct is not an authorized distributor. We offer a broad range of in-stock products with minimal lead time.

Siemens 6FC3157-0FA-Z Siemens

$0.00

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Buy the Siemens 6FC3157-0FA-Z - a genuine Siemens industrial automation component engineered for reliable performance in demanding manufacturing and process control environments. The Siemens 6FC3157-0FA-Z is a direct drop-in replacement for existing installations and ships ready for integration.

Siemens 6FC5371-0AA30-0AA0 Siemens

$8,977.50

Only 2 units left

Product
Article Number (Market Facing Number)	6FC53710AA300AA0 \| 6FC53710AA300AA0
Product Description	spare part SINUMERIK 840D sl NCU 710.3PN with PLC 317-3PN/DP user memory: CNC: 3 MB; PLC: 512 KB internal heat dissipation
Product family	Not available
Product Lifecycle (PLM)	PM490:Start of final year of support
Additional Product Information
EAN	Not available
UPC	887621150822
Commodity Code	85371010
LKZ_FDB/ CatalogID	NC62E
Product Group	5706
Group Code	R2S1
Country of origin	Germany
SCIP number	Not available
Delivery information
Net Weight (lb)	8.267 lb
Package size unit of measure	Not available
Packaging Quantity	1

Siemens 6FC5203-0AE00-0 Siemens

$1,035.00

Only 3 units left

Buy the Siemens 6FC5203-0AE00-0 Communication Module - an industrial network interface providing controller-to-device connectivity. Supports standard industrial protocols for seamless automation integration. The Siemens 6FC5203-0AE00-0 is a direct replacement for existing communication installations.

Siemens 6FC5111-0CA73-0AA1 Siemens

$1,223.44

Only 9 units left

Product
Article Number (Market Facing Number)	6FC51110CA730AA1 \| 6FC51110CA730AA1
Product Description	**spare part** SINUMERIK 840C/840CE DMP terminal block compact (for compact modules)
Product family	Not available
Product Lifecycle (PLM)	PM490:Start of final year of support
Additional Product Information
EAN	4025515006138
UPC	Not available
Commodity Code	85389091
LKZ_FDB/ CatalogID	NC60E
Product Group	9302
Group Code	R2S1
Country of origin	Germany
SCIP number	b5c0d036-dcf7-43d3-a31c-424cbde0c7af
Delivery information
Net Weight (lb)	1.190 lb
Package size unit of measure	Not available
Packaging Quantity	1

Siemens 6FC9344-2BB Siemens

$369.60

Only 1 unit left

Product
Article Number (Market Facing Number)	6FC93442BB
Product Description	ACCESSORIES F.SINUMERIK/SIROTEC F. 6FC9 320-3K. POS. ENCODER CONNECTING CABLE 5M
Product family	Not available
Product Lifecycle (PLM)	PM500:Discontinued Product or end of PLM & Support
Additional Product Information
EAN	Not available
UPC	Not available
Commodity Code	Not available
LKZ_FDB/ CatalogID	NCZ
Product Group	Not available
Group Code	R752
Country of origin	Not available
SCIP number	Not available
Delivery information
Net Weight (lb)	Not available
Package size unit of measure	Not available
Packaging Quantity	Not available

Siemens 6FC3641-0AA Siemens

$10,470.68

Only 1 unit left

Product
Article Number (Market Facing Number)	6FC36410AA
Product Description	PRIMO SG (CPU III) W. SW 401 FOR GRINDING MACHINES
Product family	Not available
Product Lifecycle (PLM)	PM500:Discontinued Product or end of PLM & Support
Additional Product Information
EAN	Not available
UPC	Not available
Commodity Code	Not available
LKZ_FDB/ CatalogID	NC.PE
Product Group	Not available
Group Code	R211
Country of origin	Not available
SCIP number	Not available
Delivery information
Net Weight (lb)	Not available
Package size unit of measure	Not available
Packaging Quantity	Not available

Siemens 6FC5111-0BA03-0AA0 Siemens

$1,592.22

Only 2 units left

Product
Article Number (Market Facing Number)	6FC51110BA030AA0
Product Description	**spare part** SINUMERIK 840C/840CE measuring circuit module analog, 40 mm 3 measuring circuits with 2 EXE 5-/10-fold switchable
Product family	Not available
Product Lifecycle (PLM)	PM490:Start of final year of support
Additional Product Information
EAN	4025515006053
UPC	Not available
Commodity Code	85389091
LKZ_FDB/ CatalogID	NC.840CE
Product Group	9302
Group Code	R2S1
Country of origin	Germany
SCIP number	Not available
Delivery information
Net Weight (lb)	1.301 lb
Package size unit of measure	Not available
Packaging Quantity	1

Siemens 6FC5210-0DB21-3AA1 Siemens

$4,547.46

Only 3 units left

Buy the Siemens 6FC5210-0DB21-3AA1 - a genuine Siemens industrial automation component engineered for reliable performance in demanding manufacturing and process control environments. The Siemens 6FC5210-0DB21-3AA1 is a direct drop-in replacement for existing installations and ships ready for integration.

Siemens 6FC5203-0AC00-1AA0 Siemens

$3,406.95

Only 9 units left

Product
Article Number (Market Facing Number)	6FC52030AC001AA0 \| 6FC52030AC001AA0
Product Description	**spare part** SINUMERIK full CNC keyboard OP 032S in QWERTY version AT incl. 1.5 m cable, standard/US layout width 310 mm; for MMC 100.2/101/102/103 and PCU 20/50/70
Product family	Not available
Product Lifecycle (PLM)	PM490:Start of final year of support
Additional Product Information
EAN	4025515019275
UPC	Not available
Commodity Code	84716060
LKZ_FDB/ CatalogID	NC60E
Product Group	5705
Group Code	R2S1
Country of origin	Germany
SCIP number	Not available
Delivery information
Net Weight (lb)	3.860 lb
Package size unit of measure	Not available
Packaging Quantity	1

Siemens 6FC5110-0DA01-0AA0 Siemens

$2,889.63

Only 3 units left

PLC Direct is not an authorized distributor. We offer a broad range of in-stock products with minimal lead time.

Siemens 6FC3568-3ET20 Siemens

$359.87

Only 3 units left

Buy the Siemens 6FC3568-3ET20 HMI Operator Panel - an industrial touchscreen interface for machine monitoring and control. Features rugged industrial-grade display, configurable visualization, PLC connectivity, and intuitive operator interface. The Siemens 6FC3568-3ET20 is suited for factory automation, process control, and packaging. Direct replacement for existing installations.

Siemens 6FC3988-7FA20 Siemens

$922.53

Only 1 unit left

Product
Article Number (Market Facing Number)	6FC39887FA20
Product Description	SINUMERIK OPTION SUPPLIED SEPARATELY OPERATOR PANEL 12" COMPLETE MONOCHROME
Product family	Not available
Product Lifecycle (PLM)	PM500:Discontinued Product or end of PLM & Support
Additional Product Information
EAN	Not available
UPC	Not available
Commodity Code	Not available
LKZ_FDB/ CatalogID	NC.880
Product Group	Not available
Group Code	R211
Country of origin	Not available
SCIP number	Not available
Delivery information
Net Weight (lb)	Not available
Package size unit of measure	Not available
Packaging Quantity	Not available

Siemens 6FC9340-6TY00-1BA0 Siemens

$739.20

Only 1 unit left

Product
Article Number (Market Facing Number)	6FC93406TY001BA0 \| 6FC93406TY001BA0
Product Description	SIGNAL CABLE, PREASSEMBLED (SINUMERIK 3/8/PRIMO TO LMS) LENGTH (M) = 0 + 10 + 0 + 0
Product family	Not available
Product Lifecycle (PLM)	PM500:Discontinued Product or end of PLM & Support
Additional Product Information
EAN	Not available
UPC	Not available
Commodity Code	85444290
LKZ_FDB/ CatalogID	NCZ
Product Group	9306
Group Code	R2S3
Country of origin	Slovakia
SCIP number	Not available
Delivery information
Net Weight (lb)	2.701 lb
Package size unit of measure	Not available
Packaging Quantity	1

Siemens 6FC3901-0AA-Z Siemens

$2,015.95

Only 1 unit left

PLC Direct is not an authorized distributor. We offer a broad range of in-stock products with minimal lead time.

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CNC controllers are the central hardware units that govern all axis motion, PLC sequencing, and operator interaction for CNC machine tools, and the failure of a controller can bring an entire machining operation to a standstill. Sourcing a compatible replacement CNC controller for an installed system requires matching not only the brand and model but also the specific generation, axis configuration, and communication architecture. PLC Direct supplies surplus sealed, refurbished, and used CNC controllers for installed Siemens SINUMERIK and Fanuc CNC machining systems.

Where Are CNC Controllers Used in Industrial Environments?

CNC controllers are used wherever machine tools require numerically controlled, multi-axis motion for cutting, forming, or finishing operations, from standalone turning centers to large multi-axis machining cells. Machine tool controllers from Siemens SINUMERIK and Fanuc CNC Series platforms are found across a wide range of metalworking and precision manufacturing environments. Facilities and operations that depend on CNC controllers include:

Metal cutting and machining centers using SINUMERIK CNC controls or Fanuc CNC systems to govern coordinated multi-axis milling, turning, drilling, and grinding operations.

Automotive manufacturing plants running high-volume CNC machining lines where replacement machine tool controllers must match the installed platform generation.

Aerospace fabrication operations dependent on tight-tolerance CNC machining, where CNC controller continuity is critical to maintaining process specifications.

Tool and die shops maintaining older SINUMERIK 828D or Fanuc Series 0i installations, where controller replacement is the only alternative to full machine decommissioning.

Industrial production facilities managing multi-brand CNC fleets requiring replacement CNC controls across both Siemens and Fanuc platforms within the same operation.

When a CNC controller fails in a production environment, the priority is sourcing a compatible replacement that restores the machine to its original operating specification.

Which Brands of CNC Controllers Does PLC Direct Stock?

PLC Direct carries CNC controllers across Siemens and Fanuc platforms, covering current-generation and legacy machine tool controllers for installed CNC machining systems.

Siemens SINUMERIK 840D sl CNC Controls: Siemens SINUMERIK 840D sl CNC controllers, including NCU 710, NCU 720, and NCU 730 configurations, are stocked for replacement in installed SINUMERIK 840D sl machining systems across manufacturing and fabrication environments.

Siemens SINUMERIK 828D CNC Controls: The SINUMERIK 828D is a compact panel-based CNC controller designed for turning and milling applications, and hardware for installed 828D systems is available for replacement and lifecycle support.

Siemens SINUMERIK ONE CNC Controls: SINUMERIK ONE NCU hardware is available for replacement in current-generation Siemens CNC machining environments requiring controller-level maintenance.

Fanuc Series CNC Controls: Fanuc CNC controllers, including Series 0i, 30i, 31i, and 35i machine tool controllers, are stocked for replacement and maintenance in installed Fanuc CNC milling, turning, grinding, and multi-axis machining systems.

All CNC controllers listed above are available as surplus sealed, refurbished, or used, providing condition-grade options to match both budget and application requirements.

What Should You Know Before Ordering CNC Controllers?

Hardware condition options: CNC controllers from PLC Direct are supplied as surplus sealed, refurbished, or used. Surplus sealed units are factory-sealed and undeployed; refurbished units have been tested and restored to operational condition; used controllers are pulled from service and sold as-is under the standard PLC Direct warranty.

Compatibility and part identification: CNC controllers are generation-specific and axis-configuration-specific. For Siemens SINUMERIK hardware, confirm the exact generation (SINUMERIK 828D, 840D sl, or SINUMERIK ONE), the NCU variant, and the PLC integration type before ordering, as these are not interchangeable across generations. For Fanuc CNC controls, confirm the Series generation (0i, 30i, 31i, or 35i) and the axis count. In both cases, the part number from the installed controller is the most reliable reference for sourcing a compatible replacement.

Warranty: All CNC controllers purchased from PLC Direct carry a standard 1-year PLC Direct warranty covering defects and functionality, applicable to surplus sealed, refurbished, and used products.

PLC Direct supplies CNC controllers for replacement and maintenance purposes and does not provide system design, programming, or integration services.

Frequently Asked Questions

PLC Direct stocks CNC controllers for installed Siemens SINUMERIK and Fanuc CNC systems, including SINUMERIK 828D, 840D sl, and SINUMERIK ONE machine tool controllers, and Fanuc Series 0i, 30i, 31i, and 35i CNC controls. Hardware is available as surplus sealed, refurbished, or used to support replacement and lifecycle maintenance of installed CNC machining systems.

Confirm the CNC controller brand and generation from the installed unit, for example, Siemens SINUMERIK 840D sl NCU 720 or Fanuc Series 30i, and locate the part number from the controller housing or documentation. Search by part number on plc-direct.com or contact PLC Direct directly to confirm availability of the specific machine tool controller needed.

No. Fanuc Series CNC generations (0i, 30i, 31i, 35i) differ in axis capacity, processing architecture, and I/O configuration. A replacement Fanuc CNC controller must match the installed Series generation and axis count to restore the machine to its original specification. Always confirm the exact Series designation and part number before ordering.

The SINUMERIK 828D is a compact, panel-integrated CNC controller designed for standard turning and milling machines, with the control hardware integrated into the operator panel. The SINUMERIK 840D sl is a modular, high-performance platform based on separate NCU and operator panel hardware, suited to complex multi-axis machining, grinding, and high-speed cutting applications. The two generations are architecturally distinct, and replacement hardware is not interchangeable between them.

All CNC controllers purchased from PLC Direct are covered by a 1-year PLC Direct warranty applicable to surplus sealed, refurbished, and used products, covering defects and functionality. PLC Direct does not offer programming, configuration, or integration services.