Relife RL-068B Rechargeable Grinding Pen

The Relife RL-068B is a cordless, pen-shaped grinder for chip and board work, with the higher top speed in Relife's 068 range.

It reaches up to 18000 RPM, is rated at 1.5 W and runs from an 800 mAh rechargeable battery charged at DC 5 V. Accessories fit a 2.35 mm shank. The listing describes two speed levels. The package lists the pen, eight grinding heads, a rechargeable battery, a USB cable and a manual.

Where the RL-068B earns its place

• Epoxy that won't release when you try to lift a CPU.

• Corrosion on pads after liquid damage.

• Old solder mask that must come off before a jumper wire.

• A damaged bracket edge that catches on a flex cable.

Handling a fast pen

High speed removes material quickly, so use light passes and check often under the microscope. Hold the pen like a pencil with your wrist resting on the bench. Wear eye protection, since grit can fly off a worn head.

Choose the RL-068B when speed matters most; the RL-068C has three speed steps and a Type-C port if finer control appeals to you more.