Archive for June, 2012

Your Source for Automatic Drills, Multiple Spindle Heads, and more

How do the Professionals Drill Holes for Things Like Carburetor Jets?

Have you ever wondered how a professional drills holes?  We are not talking about your local professional wrench, but about the manufacturers.

Recently a carburetor manufacturer in Kentucky needed to drill some 1/32″ holes in brass.  They already had Dumore self-feeder drill in their shop but found that access to support and new machines was simply not up to their standards. So they contacted AutoDrill.

1100 series AutoDrill with DC Motor Set-Up

1100 Series AutoDrill for Carburetor Jet Process

After a brief discussion, it was obvious that AutoDrill’s products were of excellent quality and priced extremely competitively. So they purchased two machines immediately.

In May of 2012, the company took delivery of the drills and has been using them ever since.  Because they chose the 1100 Series AutoDrill the size of the units was kept to a minimum and their drilling fixture was extremely simple. they even chose to go with a 3500 RPM, 90VDC motor with a very simple 115VAC controller package.

The industry standard ER11 style collet chuck on the self feeding drill made it possible for them to purchase an entire set of properly sized collets for different jobs. Because these collets are available from thousands of vendors around the globe, they will never have to worry about finding proprietary items to stay in business.

AutoDrill can offer units with up to 1000 lbs. of thrust at 100 PSI and spinning multiple tools for drilling, tapping, reaming, etc.

Please CONTACT US to discuss your application and receive prompt product cost, literature and technical help.

Taps Standards ISO Metric Series Chart

TapsStandardsISOMetricSeriesChart.pdf

Taps Standards and Dimensions
A metric tap with an ANSI shank uses the same tap collet as an inch tap with the same shank diameter. There are some less common all-metric taps, but you often don’t find these anywhere inside the USA, Canada or Mexico.

ISO Metric Series

Tap Size Shank Dia.               A      Shank Length B              Size of     Square C    Overall Length     D
M09 2.5 (.098″) 17 2.1 x 5 25
M1 2.5 (.098″) 18 2.1 x 5 25
M1.1 2.5 (.098″) 18 2.1 x 5 25
M1.2 2.5 (.098″) 18 2.1 x 5 25
M1.4 2.5 (.098″) 21 2.1 x 5 28
M1.6 2.5 (.098″) 24 2.1 x 5 32
M1.7 2.5 (.098″) 24 2.1 x 5 32
M1.8 2.5 (.098″) 24 2.1 x 5 32
M2 2.8(.110″) 23 2.1 x 5 32
M2.2 2.8(.110″) 23 2.1 x 5 32
M2.3 2.8(.110″) 23 2.1 x 5 32
M2.5 2.8(.110″) 26 2.1 x 5 36
M2.6 2.8 (.110″) 26 2.1 x 5 36
M3 3.5 (.138″) 26 2.7 x 6 36
M3.5 4.0 (.157″) 29 3.0 x 6 40
M4 4.5 (.177″) 28 3.4 x 6 40
M4.5 6.0 (.236″) 33 4.9 x 8 45
M5 6.0 (.236″) 31 4.9 x 8 45
M6 6.0 (.236″) 34 4.9 x 8 50
M7 6.0 (.236″) 34 4.9 x 8 50
M8 6.0 (.236″) 38 4.9 x 8 56
M9 7.0 (.275″) 38 5.5 x 8 56
M10 7.0 (.275″) 43 5.5 x 8 63
M11 8.0 (.314″) 41 6.2 x 9 63
M12 9.0 (.354″) 48 7.0 x 10 70
M14 11.0 (.433″) 45 9.0 x 12 70
M16 12.0 (.472″) 42 9.0 x 12 70
M18 14.0 (.552″) 48 11.0 x 14 80
M20 16.0 (.629″) 48 12.0 x 15 80
M22 18.0 (.708″) 58 14.5 x 17 90
M24 18.0 (.708″) 68 14.5 x 17 100
M27 20.0 (.787″) 64 16.0 x 19 100
M30 22.0 (.866″) 70 18.0 x 21 110

AutoDrill generally offers tapping devices for single spindle operations as well as multiple spindle operations with ER11, ER16, ER20, ER25, ER32 and ER40 spindle types. We also offer TRxx and ASA style spindles as well as custom spindles if needed.

Diamond Drill Bits Speed Chart

DiamondDrillBitsDrillSpeedsChart.pdf

Recommended Drill Speeds

DiamondSure Diamond Drill Bits Recommended Drill Speed (rpm)
Material                Bit Size–> 1/2″ 1″ 2″ 3″ 4″
Fiberglass 1200 700 350 250 175
Glass, Ceramic & China 800 500 250 160 125
Limestone & Marble Stone 600 450 225 130 100
Ceramic Wall Tile 600 450 225 130 100
Porcelain Wall Tile 500 375 180 125 90
Porcelain Floor Tile 500 375 180 125 90
Granite Stone 400 300 150 100 75

(Not for use on Concrete or Masonry, or with Hammer Drills)

SPEED KILLS:  Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably.

Since all meterials vary in hardness and abrasiveness, it is impossible to determine exact drill speeds.  Additionally, as discussed below, lubrication and drill pressure must also be considered when determining the proper drill speed.  A faster drill speed or increased pressure may reduce the cutting time slightly, but it will also increase the friction significantly and heat up the bit, reducing the bit life considerably and increasing the risk of heat fractures and material breakage.  If used proplerly, a diamond drill bit should never be more than warm when touched after use.  If a drill bit develops yellow, brown, blue or black ‘burn marks’ around the tip, it is an indication of extreme heat and that the drill speed being used is too fast or the amount of pressure on the drill is too great.