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Martindale Undercutting Saws

GENERAL
     Martindale Undercutting Saws and V-Cutters are available in High-Speed Steel of Tungsten-Carbide.  Both types are carefully designed as to tooth form, hollow grind, hardness, etc., and manufactured to close tolerances in our own plant.
     While used primarily for undercutting mica and slotting risers of commutators, Martindale Undercutting Saws and V-Cutters are also used for cutting steel, aluminum, plastics, and other materials not requiring set teeth. 
     Undercutting differs from ordinary machining in that, instead of shearing, it is a combination of crushing, grinding, and conveying.  Mica is very abrasive and varies in hardness, making necessary the very best design and production controls in the manufacture of undercutting saws.

HIGH-SPEED STEEL SAWS and V-CUTTERS
     These can be used on either portable or stationary equipment with spindle speeds of 1,500 to 5,000 r.p.m.
    (See Martindale Mica Undercutters for 16 Undercutters.)

Metric Sizes

25mm. O.D. × 7mm. I.D. Saws and
V-Cutters in stock, along with
other metric sizes,
upon request.

H.S.S. V-CUTTERS ("V"-Slot)

     Illustrations above; specifications below.  These cutters are all 0.045" thick and stocked with 40°, 50°, and 60° angles between cutting edges.  40° V-cutters are for thin mica, 50° for medium mica, 60° for thick mica.
     Be Sure to Specify Angle 40°, 50°, or 60°.

H.S.S.  SAWS  (U-Slot)

     Illustrations at left and above; specifications below.  Saws stocked in these thicknesses:
.015"  .023"  .028"  .035"  .043"  .053"  .060"  .018" 
.025"  .030"  .038"  .045"  .055"  .063"  .020"  .026" 
.032"  .040"  .050"  .058"  .065" 

     Be Sure to Specify Thickness. 

Tungsten-Carbide Saws
& V-Cutters

See H.S.S. Mica Saws for "General" discussion of Undercutting Saws.

     The teeth of both saws and V-cutters have slight land to give strength to the cutting edge.  Saws are hollow-ground for clearance, V-cutters have ample radial relief.  When Carbide Saws are used on other equipment than our undercutters, steel supporting washers are recommended to reduce breakage.  Spindle speeds may vary from 3,000 to 12,000 r.p.m., depending on Saw O.D.  Martindale's Carbide Saw Blades are harder than High Speed Steel Saws, therefore more brittle and should not be subjected to applications where shock may shorten the service life. Use on rigid stationary equipment is recommended.
     See Undercutters for 9 Martindale Undercutters for the use with these saws: Close-Cut, Kut-Kwik, Utility, Bench-Type Model HV-3, Lathe-Type and Super Lathe Type, Heavy-Duty Bench-Type Model H-9, Industrial Model HA-2, and Model UL Lathe Mounted Automatic.

COMPOUND-LAND  SAWS

     The compound-land feature, sketched at right, is available on Tungsten-Carbide "U"-slots saw 9/16" O.D. and up (#18-TC through #116-TC) at a 30% premium in price.  Because of this feature, each tooth cuts only 50% of full slot width, resulting in better chip clearance, cooler operation and production increases of up to 60% over the square-tooth Saw.  To order, add "CL" to Catalog Number.  Minimum thickness 0.015".

SPECIALS
Your inquiries are invited for sizes not listed on the H.S.S. or Tungsten-Carbide Saw Pages