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Spearhead High Speed Steel 90 Degree Bearing Bur Master Kit of 33 Pieces - Otto Frei
Spearhead

Spearhead High Speed Steel 90 Degree Bearing Bur Master Kit of 33 Pieces

Part # 119.319 In Stock Weight -- lb / -- g
$278.00
Volume pricing
Total qty Discount Per unit You save
1 — $278.00 —
2 – 3 5% off $264.10 $13.90
4 – 11 7% off $258.54 $19.46
12 + 10% off $250.20 $27.80
Add 1 more for 5% off, saves another $13.90 each.

Important Notice: This set may ship incomplete. Due to ongoing supply constraints, Spearhead has been unable to fulfill all sizes in this kit as ordered. Otto Frei will contact you with the exact burs in stock, the sizes unavailable, and an updated reduced kit price at the time of your order. We are not back-ordering missing sizes, as restocking timelines are unknown and inventory returns randomly. For reference, as of 4/17/2025, 27 of the 33 sizes were available — actual stock will vary on your order date.

Spearhead High Speed Steel (HSS) 90-degree setting burs are hand cut by expert craftsmen in the USA. Identifiable by the size stamped on each 3/32" shank, these burs offer superior hardness and longer service life compared to machine-cut Tungsten Vanadium Carbon Steel burs. HSS setting burs are the preferred choice of quality jewelers who demand consistent, precise seat cutting across a full range of stone sizes.

This master kit represents the complete Spearhead HSS 90-degree setting bur range — one bur per size — spanning 0.90 mm through 11.10 mm.

Features

  • Hand cut by expert craftsmen in the USA
  • High Speed Steel (HSS) construction for superior hardness and edge retention
  • Longer service life than machine-cut Tungsten Vanadium Carbon Steel burs
  • 90-degree included angle for precise stone seat cutting
  • Size stamped on each 3/32" shank for easy identification
  • Covers a wide metric size range: 0.90 mm – 11.10 mm

Specifications

Material High Speed Steel (HSS)
Bur Type 90-Degree Setting Bur
Shank Size 3/32"
Cut Type Hand cut
Origin USA
Kit Quantity (full set) 33 pieces
Size Range 0.90 mm – 11.10 mm

What's Included

Part No. Bur No. Metric Size
119.421 1 0.90 mm
119.422 2 1.10 mm
119.423 3 1.30 mm
119.424 4 1.50 mm
119.425 5 1.70 mm
119.426 6 1.90 mm
119.427 7 2.10 mm
119.428 8 2.30 mm
119.429 9 2.50 mm
119.430 10 2.70 mm
119.431 11 2.90 mm
119.432 12 3.10 mm
119.433 13 3.30 mm
119.434 14 3.50 mm
119.435 15 3.80 mm
119.436 16 4.00 mm
119.437 17 4.30 mm
119.438 18 4.50 mm
119.439 19 4.70 mm
119.440 20 5.00 mm
119.442 22 5.20 mm
119.443 23 5.40 mm
119.444 24 5.60 mm
119.445 25 5.90 mm
119.446 26 6.30 mm
119.447 27 6.70 mm
119.448 28 7.20 mm
119.449 29 7.60 mm
119.450 30 8.00 mm
119.451 31 8.90 mm
119.452 32 9.60 mm
119.453 33 10.40 mm
119.454 34 11.10 mm

Notes

This kit is currently subject to partial fulfillment only. Otto Frei will reach out after your order is placed to confirm available sizes and provide an adjusted price based on current inventory. Missing sizes are not placed on back order.

California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.
Brand
Spearhead
Part #
119.319
Type
Burs
Dimensions
5.5 in x 3.5 in x 3 in
Material
High Speed Steel (HSS)
Bur Type
90-Degree Setting Bur
Shank Size
3/32"
Cut Type
Hand cut
Kit Quantity (full set)
33 pieces
Size Range
0.90 mm – 11.10 mm