Jewellery Tools UK — Hand Tools for Jewellers & Silversmiths

Hand Twist Spiral Drill — 4.5 Inch Mini Press for PCB & Pin Repair, 0.34–1.09 mm Bits

Hand Twist Spiral Drill — 4.5 Inch Mini Press for PCB & Pin Repair, 0.34–1.09 - Main image
$4.75 $6.99 In stock

Category: Jewellery Making Tools

A hand-powered spiral drill for fine holes where a rotary tool would wander or tear — pilot holes in delicate metalwork, pin holes in repairs, and fine work in PCBs, plastics and soft woods. Press down and the spiral shaft converts the stroke into smooth rotation; the external steel spring resets the collar for the next press. It earns its keep on the small jobs covered in our guide to common bench repairs.

The knurled three-jaw chuck holds micro bits from 0.34 mm to 1.09 mm, and the free-spinning head cap lets you steady the tool with palm pressure whilst it turns. At 4.5 inches overall, the steel body stays controllable in confined spaces. Seat bits square in the chuck and let the tool cut at its own pace.

  • Self-advancing spiral shaft provides smooth, continuous rotation with each press.
  • Knurled three-jaw chuck securely holds micro drill bits from 0.34mm to 1.09mm.
  • Free-spinning head cap allows for comfortable palm pressure whilst operating.
  • External steel spring automatically resets the collar after each down-stroke.
  • Compact 4.5-inch length for controlled work in confined spaces.

Who it's for

A core tool for UK bench jewellers, horologists, and electronics technicians performing delicate repairs or modifications. Also favoured by scale modelmakers for drilling fine pilot holes in plastics, soft woods, and non-ferrous metals.

Specifications

  • Overall Length: 4.5" (approx. 114mm)
  • Chuck Capacity: 0.34mm to 1.09mm
  • Material: Steel construction

Free UK delivery · Same-day dispatch before 2pm · 30-day returns

SKU: OS-WKBO-RIAN

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Timothy X. ★★★★★

The press-down mechanism is exactly what I needed for drilling clean holes in soft silver without the bit slipping. Those tiny 0.34mm bits fit snugly and cut through plastic PCB material like butter.

Eva ★★★★★

Finished a delicate pendant repair this morning and the 0.34 mm bit went through clean without any of the skipping I get from a rotary tool. The hand twist motion gives you way more control on thin metal, and the spiral design clears the shavings as you go. It’s become my go-to for any tiny pilot ho

Alexander ★★★★★

The downward pressure action is surprisingly smooth for such a compact tool, and the 0.34 mm bit made a clean hole in a thin brass sheet without any slipping. I've been using it for watch repair, and it's far more controlled than my hand drill.

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