RFID Tool Tracking in India: Tool Cribs, MRO and FOD

How does an RFID tool crib work?

1. Tag and register: each tool gets a tag whose number is entered in the tool register against the tool's description, serial number and calibration due date.
2. Issue: the technician's ID card and the tools are read at the crib counter or door, so the issue is recorded against a person.
3. In use: a handheld finds a tool on the shop floor when someone needs it.
4. Return: the tools are read back in, and the software lists anything still out.
5. Calibration and service: the register flags tools that are due, and the software can block the issue of a tool whose calibration has lapsed.

The tag carries only an ID. The tool's details, its calibration record and its issue history live in the register software; the RFID tool tracking system page shows how the parts fit together.

Which RFID tag fits which tool?

Tools are metal and often small, so they need on-metal tags, and the smallest of those read at short range. The figures are from each product page; read distance depends on the reader and on the tool the tag is fixed to.

The PCB micro tags are rated for operation from −20 °C to +150 °C, and all of these tags are sold with a minimum order of 500 pcs per type. The wider choice is in the on-metal tag range and the PCB and ceramic tag range, and our guide to choosing on-metal tags explains the trade-off between size and read distance.

How do you fix a tag to a tool so it stays on?

• Choose the spot: a flat area away from the jaws, the working end and the grip, where the tag will not be knocked or worn.
• Recess small tags: on tools that get dropped, a shallow counterbore lets a disc or ceramic tag sit flush under its adhesive.
• Use the right fixing: an epoxy suited to the oils and solvents in your workshop for discs and ceramic tags; screws or rivets for the larger PCB tags; a stud for the IDTS-7024.
• Cylindrical handles: a heat-shrink sleeve over the tag holds it on a round handle and protects the edges.
• Calibrated tools: never drill or bond onto a part that affects calibration; ask the tool maker where a tag may go.
• Keep the printed IDs: the tool's own serial number and any calibration label stay visible; the RFID tag adds to them.

Test every fixing on the actual tool before tagging a whole crib: the same tag reads differently on a long spanner and on a small socket.

Which readers go at the crib and on the shop floor?

Because the smallest tags read at about a metre or less on metal, a counter where tools are placed in front of the reader works better than a wide doorway. The technician's ID card can be read by a separate card reader wired to the same controller, often over Wiegand; our guide to RFID reader interfaces explains the options.

What does DGCA's CAR-145 ask for on tools?

Aircraft maintenance organisations approved under CAR-145 must have and use the tools and equipment their approved work needs, and must control and calibrate tools, equipment and especially test equipment to an officially recognised standard, keeping calibration records and traceability (145.A.40). The acceptable means of compliance adds that tools needing control for servicing or calibration should be clearly identified and listed in a control register, including any personal tools the organisation allows, and that a clear labelling system should show when each item's next inspection, service or calibration is due.

RFID does not change these requirements. It gives every tool a readable identity that points to its control register entry, so the register is quicker to keep and an audit is quicker to run; the visible labels still stay on the tools. We quote CAR-145 Issue 02 of 8 October 2013, the copy we could fetch; check the current revision on the DGCA website before you write it into a procedure.

Why does a shift-end tool count matter for FOD?

The US Federal Aviation Administration defines foreign object debris (FOD), in its advisory circular on airport FOD management, as any object, living or not, in an inappropriate place in the airport environment that can injure airport or airline staff or damage aircraft. A spanner left on an apron or in an engine bay is exactly that. A crib that knows which tools are still out at the end of a job lets the supervisor stop and search before the aircraft is released, instead of discovering the gap at the next stock-take.

The same logic applies outside aviation: railway workshops, power plants, refineries and production lines all lose time and risk damage when a tool goes missing inside a machine. For defence workshops, our DEFSAC supplier guide covers how defence units buy RFID tool tags, and our guide to fixed asset audits covers larger equipment.

How do we pilot RFID in one tool crib?

Start with one crib and its most-issued tools. Order samples of two or three tag types, fix them to the real tools, and run issue, return and shift-end checks for a few weeks, logging every missed read and every tag that comes loose. Then settle the tag per tool type and the fixing method before tagging the rest. Our RFID pilot plan gives a reusable test protocol, and you can request tag samples; readers are bought, not sampled.