Microstop piloted countersinks when used with a microstop cage can be adjusted to the required depth in increments of 0.001”. Widely used within the aerospace industry to aid the huge task of countersinking the millions of holes to produce an aircraft.  These tools come with standard corner radius’ to form a precise rounded edge between the countersink angle and the pre-drilled hole.  The standard corner radius’ have been chosen to suit common aircraft rivets. However, our specialist machinery enables us to produce any angle and corner radius to suit more bespoke applications. We supply these with metric or imperial threads to suit all common microstop cages. 

Supplied in 90º, 100º and 120º as standard with other angles such as 82º available on request with little increase in price and lead time.

Cages are also available for purchase on request

 

90° / 100° / 120°

Code Pilot Diameter Cutter Diameter Inclusive Angle Thread Radius between Pilot & Flute
S2.38-90-10 3/32 10.00 90 M6x1 0.010”-0.015”
S3.17-90-10 1/8 10.00 90 M6x1 0.015”-0.020”
S3.96-90-10 5/32 10.00 90 M6x1 0.020”-0.025”
S4.76-90-10 3/16 10.00 90 M6x1 0.020”-0.025”
S4.76-90-14 3/16 14.00 90 M8x1 0.025”-0.030”
S6.35-90-14 1/4 14.00 90 M8x1 0.025”-0.030”
S7.94-90-17 5/16 17.00 90 M8x1 0.035”-0.040”
S9.52-90-21 3/8 21.00 90 M8x1 0.035”-0.040”
S2.38-100-10 3/32 10.00 100 M6x1 0.010”-0.015”
S3.17-100-10 1/8 10.00 100 M6x1 0.015”-0.020”
S3.96-100-10 5/32 10.00 100 M6x1 0.020”-0.025”
S4.76-100-10 3/16 10.00 100 M6x1 0.020”-0.025”
S4.76-100-14 3/16 14.00 100 M8x1 0.025”-0.030”
S6.35-100-14 1/4 14.00 100 M8x1 0.025”-0.030”
S7.94-100-17 5/16 17.00 100 M8x1 0.035”-0.040”
S9.52-100-21 3/8 21.00 100 M8x1 0.035”-0.040”
S2.38-120-10 3/32 10.00 120 M6x1 0.010”-0.015”
S3.17-120-10 1/8 10.00 120 M6x1 0.015”-0.020”
S3.96-120-10 5/32 10.00 120 M6x1 0.020”-0.025”
S4.76-120-10 3/16 10.00 120 M6x1 0.020”-0.025”
S4.76-120-14 3/16 14.00 120 M8x1 0.025”-0.030”
S6.35-120-14 1/4 14.00 120 M8x1 0.025”-0.030”
S7.94-120-17 5/16 17.00 120 M8x1 0.035”-0.040”
S9.52-120-21 3/8 21.00 120 M8x1 0.035”-0.040”

 

100°

Code Pilot Diameter Cutter Diameter Inclusive Angle Thread Decimal Equivalent
SUNF3/32-100-1/2 3/32 1/2 100 1/4-28 .0938
SUNF1/8-100-1/2 1/8 1/2 100 1/4-28 .1250
SUNF5/32-100-1/2 5/32 1/2 100 1/4-28 .1563
SUNF3/16-100-1/2 3/16 1/2 100 1/4-28 .1875
SUNF7/32-100-1/2 7/32 1/2 100 1/4-28 .2188
SUNF1/4-100-1/2 1/4 1/2 100 1/4-28 .2500