Lathe Spindle

How to calculate speed of lathe spindle turning 1/4 inch drill hole in a piece of 3inch diameter?

How to calculate speed of lathe spindle turning 1/4 inch drill hole in a piece of 3inch diameter?
Calculate the speed of lathe spindle should be turning to a drill 1/4 inch diameter hole in a piece of 3inch diameter stainless steel using a high-speed drill bit?need to know formula pls

On most lathes you set the spindle speed to what you need for the material you are machining. So I'm confused by your question do you want to know the optimum speed for drilling a 0.250" hole, if so what material are we talking about?

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Magnetic Chuck For Hardinge HLV Lathe 2 3 16 X 10 tpi spindle Thread
Magnetic Chuck For Hardinge HLV Lathe 2 3 16 X 10 tpi spindle Thread
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8 Bison 3 Jaw Lathe Chuck Direct Mount L1 Spindle
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Royal Pullback CNC Lathe 3J Collet Chuck Spindle A2 6 42063
Royal Pullback CNC Lathe 3J Collet Chuck Spindle A2 6 42063
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Royal Pullback CNC Lathe 5C Collet Chuck Spindle A2 5 42053 Haas Fadal Samsung
Royal Pullback CNC Lathe 5C Collet Chuck Spindle A2 5 42053 Haas Fadal Samsung
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4mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
4mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
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1 16 ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
1 16 ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
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6MM SUPER PRECISION COLLET FOR CNC MILLING LATHE TOOL AND SPINDLE MOTOR ER16
6MM SUPER PRECISION COLLET FOR CNC MILLING LATHE TOOL AND SPINDLE MOTOR ER16
$2.00
12mm ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
12mm ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
$1.80
1 8 ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
1 8 ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
$1.80
1 2 ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
1 2 ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
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10mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
10mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
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8mm ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
8mm ER20 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
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8mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
8mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
$2.00
16 x 40 GMC Large Spindle Bore Lathe GML 1640HD FREE DRO TAPER AND SHIPPING
16 x 40 GMC Large Spindle Bore Lathe GML 1640HD FREE DRO TAPER AND SHIPPING
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3mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
3mm ER16 Super Precision Collet for CNC Milling Lathe Tool and Spindle Motor
$2.00
3 16 ER20 super precision collet for cnc milling lathe tool and spindle mot
3 16 ER20 super precision collet for cnc milling lathe tool and spindle mot
$1.80
Seneca Falls Star Lathe 4 1 2 Spindle Nose Protector 1 1 8 12
Seneca Falls Star Lathe 4 1 2 Spindle Nose Protector 1 1 8 12
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DR KAISER MODEL C72F DRESSING SPINDLE SYSTEM NEW
DR KAISER MODEL C72F DRESSING SPINDLE SYSTEM NEW
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ATLAS CRAFTSMAN 10 12 Lathe Spindle Headstock very Nice conditionBearings
ATLAS CRAFTSMAN 10 12 Lathe Spindle Headstock very Nice conditionBearings
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NICE CRAFTSMAN 6 Metal LATHE HEADSTOCK SPINDLE DRIVE GEAR
NICE CRAFTSMAN 6 Metal LATHE HEADSTOCK SPINDLE DRIVE GEAR
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LION Lathe 28 Swing x 120 Between Centers 4 hole thru spindle Leblond
LION Lathe 28 Swing x 120 Between Centers 4 hole thru spindle Leblond
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SPINDLE SQUARE 1 2 SHANK NEW DS
SPINDLE SQUARE 1 2 SHANK NEW DS
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Okuma Lathe Spindle Nose Collet Chuck Mounting Plate SMW 1143022 L
Okuma Lathe Spindle Nose Collet Chuck Mounting Plate SMW 1143022 L
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South Bend Model A 9 Lathe Compound Bronze Spindle Feed Nut  65
South Bend Model A 9 Lathe Compound Bronze Spindle Feed Nut 65
$35.00
2006 GANESH CYCLONE 32CS 7 Axis TWIN SPINDLE MILL TURN CENTER w C
2006 GANESH CYCLONE 32CS 7 Axis TWIN SPINDLE MILL TURN CENTER w C
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South Bend Lathe 9 Headstock Spindle 3 Step Flat Belt Cone Pulley
South Bend Lathe 9 Headstock Spindle 3 Step Flat Belt Cone Pulley
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South Bend Lathe Heavy 10 10L Headstock Spindle Cone Flat Belt Pulley
South Bend Lathe Heavy 10 10L Headstock Spindle Cone Flat Belt Pulley
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ER11 Collet Set 13PCS ER11 Collet Chuck CNC Spindle ER 11 Collet Lathe Tool
ER11 Collet Set 13PCS ER11 Collet Chuck CNC Spindle ER 11 Collet Lathe Tool
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12 Bison 3 Jaw Lathe Chuck Direct Mount D1 8 Spindle
12 Bison 3 Jaw Lathe Chuck Direct Mount D1 8 Spindle
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LeBlond Regal 13 Metal Lathe Round Head HEADSTOCK SPINDLE ASSEMBLY 2 1 8 5
LeBlond Regal 13 Metal Lathe Round Head HEADSTOCK SPINDLE ASSEMBLY 2 1 8 5
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1 QUART ea MOBIL WAY OIL VACTRA 2  SPINDLE OIL VELOCITE 10 MILL LATHE GRINDER
1 QUART ea MOBIL WAY OIL VACTRA 2 SPINDLE OIL VELOCITE 10 MILL LATHE GRINDER
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MT4 Morse Taper Live Center Precision 0000197 Inch Long Spindle Lathe Tool
MT4 Morse Taper Live Center Precision 0000197 Inch Long Spindle Lathe Tool
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HARDINGE CHNC II 2 Spindle Lathe Bearings dovetail headstock
HARDINGE CHNC II 2 Spindle Lathe Bearings dovetail headstock
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JACOBS SPINDLE NOSE LATHE CHUCK D6
JACOBS SPINDLE NOSE LATHE CHUCK D6
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ER25 collet set 15pcs 2mm 16 mm for CNC milling lathe tool and spindle
ER25 collet set 15pcs 2mm 16 mm for CNC milling lathe tool and spindle
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LOT 11 Morse Taper 3 Spindle Sleeve for South Bend Heavy 10 10L
LOT 11 Morse Taper 3 Spindle Sleeve for South Bend Heavy 10 10L
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SPINDLE MOTOR CNC MILLING LATHE CHUCK TOOL 1 8 SUPER PRECISION ER16 COLLET
SPINDLE MOTOR CNC MILLING LATHE CHUCK TOOL 1 8 SUPER PRECISION ER16 COLLET
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SUPER PRECISION FOR CNC MILLING LATHE TOOL AND SPINDLE MOTOR 8MM ER16 COLLET TOP
SUPER PRECISION FOR CNC MILLING LATHE TOOL AND SPINDLE MOTOR 8MM ER16 COLLET TOP
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MT5 Spindle to MT3 Arbor Morse Taper Adapter Reducing Drill Sleeve Fitment Lathe
MT5 Spindle to MT3 Arbor Morse Taper Adapter Reducing Drill Sleeve Fitment Lathe
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