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CDI

CDI is a manufacturer of torque control tools and measurement instruments, with a product history that includes the development of the first click-type torque wrench. The brand's current catalog spans mechanical and digital torque wrenches, torque screwdrivers, interchangeable torque wrench heads, and calibration equipment. These tools are used in assembly, maintenance, and quality-control processes where fasteners must be tightened to specified torque values. CDI products are commonly found in aerospace, automotive, electronics, and industrial machinery applications, where repeatability and traceability are required. The line includes micrometer-adjustable wrenches, preset and adjustable screwdrivers, and square-drive ratcheting heads that pair with compatible handles. Torque ranges cover inch-ounce, inch-pound, foot-pound, and metric units, with some models calibrated to NIST standards. Mechanisms include click-type, which signals when the set torque is reached, and slip-type, which limits applied torque by slipping at the preset value. Digital measuring models provide a readout for verification and data collection. 3G Electric supplies CDI torque tools as part of its industrial equipment distribution. The current catalog includes 27 SKUs, covering preset T-handle screwdrivers, digital measuring screwdrivers, preset and adjustable torque bit screwdrivers, square ratcheting torque wrench heads, and non-insulated micrometer torque wrenches. Each listing includes manufacturer part numbers, torque ranges, drive or tip sizes, and mechanism type, allowing buyers to match tools to specific fastening requirements. 3G Electric supports the CDI line with specification data, logistics coordination, and quotation services for customers worldwide. For plant engineers and maintenance managers, CDI tools address the need for controlled torque in assembly and repair. Preset models reduce setup time and operator error by delivering a fixed torque value, while adjustable models allow a range of settings for varied tasks. The interchangeable head system lets users adapt a single handle to different drive sizes and geometries, reducing tool inventory. Digital and micrometer wrenches provide measurement and adjustment for applications requiring documented torque values. The product range includes tools with torque capacities from 6 inch-ounces to higher foot-pound values, covering small electronics assembly through heavier mechanical fastening. Build standards and materials are consistent with professional industrial use, though specific IP ratings are not published for these hand tools. 3G Electric maintains inventory and provides access to the full CDI torque tool line, with part-number-level detail to support procurement and maintenance planning.

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About CDI

CDI is a manufacturer of torque control tools and measurement instruments, with a product history that includes the development of the first click-type torque wrench. The brand's current catalog spans mechanical and digital torque wrenches, torque screwdrivers, interchangeable torque wrench heads, and calibration equipment. These tools are used in assembly, maintenance, and quality-control processes where fasteners must be tightened to specified torque values. CDI products are commonly found in aerospace, automotive, electronics, and industrial machinery applications, where repeatability and traceability are required. The line includes micrometer-adjustable wrenches, preset and adjustable screwdrivers, and square-drive ratcheting heads that pair with compatible handles. Torque ranges cover inch-ounce, inch-pound, foot-pound, and metric units, with some models calibrated to NIST standards. Mechanisms include click-type, which signals when the set torque is reached, and slip-type, which limits applied torque by slipping at the preset value. Digital measuring models provide a readout for verification and data collection. 3G Electric supplies CDI torque tools as part of its industrial equipment distribution. The current catalog includes 27 SKUs, covering preset T-handle screwdrivers, digital measuring screwdrivers, preset and adjustable torque bit screwdrivers, square ratcheting torque wrench heads, and non-insulated micrometer torque wrenches. Each listing includes manufacturer part numbers, torque ranges, drive or tip sizes, and mechanism type, allowing buyers to match tools to specific fastening requirements. 3G Electric supports the CDI line with specification data, logistics coordination, and quotation services for customers worldwide. For plant engineers and maintenance managers, CDI tools address the need for controlled torque in assembly and repair. Preset models reduce setup time and operator error by delivering a fixed torque value, while adjustable models allow a range of settings for varied tasks. The interchangeable head system lets users adapt a single handle to different drive sizes and geometries, reducing tool inventory. Digital and micrometer wrenches provide measurement and adjustment for applications requiring documented torque values. The product range includes tools with torque capacities from 6 inch-ounces to higher foot-pound values, covering small electronics assembly through heavier mechanical fastening. Build standards and materials are consistent with professional industrial use, though specific IP ratings are not published for these hand tools. 3G Electric maintains inventory and provides access to the full CDI torque tool line, with part-number-level detail to support procurement and maintenance planning.

Common Applications

  • Electronics assembly — CDI 401NSM digital measuring torque screwdriver for precision fastening of small components within 50–450 N-cm.
  • Aerospace maintenance — CDI 501MRMH micrometer torque wrench for calibrated tightening of fasteners from 10 to 50 in-lb.
  • Automotive assembly — CDI preset T-handle torque screwdrivers (TLPT4NM, TLPT5NM) for repetitive tasks at fixed torque values.
  • Industrial machinery repair — CDI square ratcheting torque wrench head TCQJD12A-80 with compatible handle for 3/8 in drive fasteners.
  • Appliance manufacturing — CDI adjustable torque bit screwdriver 61SM for controlled torque from 20 to 100 in-oz on small fasteners.
  • General maintenance — CDI preset torque bit screwdriver 21SP for low-torque applications from 6 to 32 in-oz with slip-type mechanism.

Frequently asked questions

Common questions about CDI from 3G Electric.

What is the difference between click-type and slip-type CDI torque screwdrivers?

Click-type CDI torque screwdrivers produce an audible and tactile signal when the preset torque is reached, allowing the operator to stop applying force. Slip-type models instead slip or disengage at the set torque, preventing further tightening. Click-type is often used where the operator needs a clear indication, while slip-type is chosen for applications where over-torque must be avoided even if the signal is missed. Both mechanisms are available in preset and adjustable versions across the CDI screwdriver line.

Are CDI micrometer torque wrenches calibrated to NIST standards?

Some CDI micrometer torque wrenches, such as the 501MRMH model, are calibrated to NIST standards. This means they are tested against standards traceable to the National Institute of Standards and Technology. Buyers should verify the calibration status of the specific part number they require, as not all models may include this calibration by default. 3G Electric lists calibration details in the product specifications where available.

What torque ranges are available in CDI preset T-handle torque screwdrivers?

CDI preset T-handle torque screwdrivers are available in fixed torque values. Examples include the TLPT4NM preset to 2.9 lb-ft and the TLPT5NM preset to 3.7 lb-ft. These tools use a click-type mechanism and have a 1/4 inch tip size. Because they are preset, the torque value is not adjustable by the user. They are intended for repetitive assembly tasks where a single torque setting is required.

Can CDI square ratcheting torque wrench heads be used with any handle?

CDI square ratcheting torque wrench heads are designed for use with compatible CDI torque wrench handles. The head, such as part number TCQJD12A-80, has a 3/8 inch drive and a specific overall length. Compatibility depends on the handle's interface and torque capacity. Users should confirm that the handle and head are rated for the required torque and that the connection type matches. 3G Electric can provide part-number-level details to assist with matching components.

What is the torque range of the CDI 401NSM digital measuring torque screwdriver?

The CDI 401NSM digital measuring torque screwdriver has a torque range of 50 to 450 N-cm. It uses a slip-type mechanism and has a 1/4 inch tip size. This model provides a digital readout for measuring applied torque, making it suitable for verification and documentation in assembly or maintenance processes. The slip mechanism helps prevent over-torque by disengaging at the set value.

Does 3G Electric stock the full range of CDI torque tools?

3G Electric currently lists 27 CDI SKUs, covering torque screwdrivers, torque wrench heads, and micrometer torque wrenches. Availability may vary by part number. For specific models not shown in the online catalog, buyers can request a quote. 3G Electric provides specification data, logistics coordination, and global shipping for CDI products.