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Circumferential Speeds for High Speed Twist Drill Table








The screw speed is considered as an essential machine=related process parameter and is used as an input variable for establishing the operating point. It is the circumferential screw speed, however, that is relevant to the quality of the melt. The molder should get used to dealing with circumferential speeds.

The circumferential speed, or alternatively the revolutions per minute, is preselected process parameters on the display device of the machine control unit. It is necessary to verify the selected data very precisely or, at least, to reproduce them exactly. Most machines nowadays do not measure rotational or circumferential speed and, accordingly, the feeding process would help to raise the quality of injection molding, especially if just-in-time production necessitates exchanging machines.

At present, the screw-driving hydraulic motor is almost exclusively regulated with position controlled proportional valves or servo valves. Also available is a very precise speed control with a three-phase servo electric motor that is regulated by a resolver. These solutions, which are not inexpensive, are offered the most machine producers today because they eliminate the need for reduction gear, which would be required otherwise.


Ferrous Materials
Non Alloy Steels
(a) Upto 0.40% Carbon Content 80-100 24-30
(b) 0.40% to 0.70% Carbon Content 60-80 18-24
(c) Over 0.70% Carbon Content 40-60 12-18
Alloy Steels    
(a) Upto 60 tons Tensile 50-70 15-21
(b) 60-80 tons Tensile 30-50 9-15
(c) Over 80 tons Tensile 15-30 4.5-9
Austenitic Stainless Steel    
Non Magnetic    
Magnetic Stainless Steel    
Steel Magnetic 40-60 12-18
Alloyed Cast Iron 50-70 15-21
Grey Cast Iron 80-100 24-30
12-14% Manganese Steels 12-14 3.5-4.5
Non Ferrous Materials    
Bronze Ordinary 100-200 30-60
Brass 200-250 60-75
Copper 65-70 19-21
Magnesium & Magnesium 200-300 60-90
Alloys    
Monel Metal 20-50 6-15
Nimonic Alloys 20-30 6-9
Nickel 30-50 9-15
Zinc base Alloys(mazac) 150-250 45-75


Related References:
Screw Thread Limits Table
UNC UNF Threads Per Inch TPI Threads Per Inch
Wood Screw Pilot Hole Sizes Table
Standard NPT National Pipe Thread Tap Drill Sizes Table
ASTM ISO Metric Thread Sizes and Tap Drill Table
Tapping Drill Size and Clearance Drill Size for Metric Threads
Standard Number Drill Sizes Table
Metric Thread Size Tap Drill Table
Standard Tap Drills Clearance Holes Table
Standard Letter Drill Sizes Table
Standard Drill Sizes Decimal Equivalents Table
Socket Head Cap Screw Sizes Dimension Table
SAE Grade ASTM Bolt Identify Marks Mechanical Properties
Steel Bolt Torque Specifications Table
Finished Hex Nut Dimensions
Heavy Hex Nut Dimensions Table
Standard ANSI Type B Flat Washer Sizes
Circumferential Speeds for High Speed Twist Drill Table

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UNS N08020 2.4600 Nickel Alloy 20 Seamless Tubing
UNS N02200 2.4066 200 Nickel Alloy Seamless Tubing
UNS N04400 400 Nickel Alloy 2.4360 Nickel Alloy Tubing
UNS N08800 800 Nickel Alloy Seamless Tubes
UNS N08810 800H UNS N08810 Nickel Alloy Seamless Tubes
UNS N08811 800HT Nickel Alloy Seamless Tubes
UNS N08825 825 2.4858 Nickel Alloy Seamless Tubes
UNS N06600 600 2.4816 Nickel Alloy Seamless Tubes
UNS N06625 625 2.4856 Nickel Alloy Seamless Tubes
UNS N10276 C-276 2.4819 Nickel Alloy Seamless Tubing
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