Lathe Spindle

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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?

Discover Lathe Spindle On eBay Below:

Carter and Son Toolworks LPSG38 12 3 8 Inch Low Profile Spindle Gouge
Carter and Son Toolworks LPSG38 12 3 8 Inch Low Profile Spindle Gouge
$112.99
MT5 Spindle to MT3 Arbor Morse Taper Adapter Reducing Drill Sleeve For Lathe
MT5 Spindle to MT3 Arbor Morse Taper Adapter Reducing Drill Sleeve For Lathe
$28.89
Saber 1440 Gear Head Lathe with DRO and 2 Spindle Bore
Saber 1440 Gear Head Lathe with DRO and 2 Spindle Bore
$6,100.00
Royal Pullback CNC Lathe 5C Collet Chuck Spindle A2 6 42055
Royal Pullback CNC Lathe 5C Collet Chuck Spindle A2 6 42055
$1,187.00
EMCO CNC lathe MC 425 C axis 2 spindle
EMCO CNC lathe MC 425 C axis 2 spindle
$25,500.00
6mm Super precision ER16 collet for CNC milling lathe tool and spindle motor
6mm Super precision ER16 collet for CNC milling lathe tool and spindle motor
$3.09
South Bend 14 1 2 145 Lathe Headstock Spindle 2 1 4 6 2 1 4 x 6tpi
South Bend 14 1 2 145 Lathe Headstock Spindle 2 1 4 6 2 1 4 x 6tpi
$124.99
Milling Machine Lathe Keyed Spindle Shaft Maybe Bridgeport or Cincinnati
Milling Machine Lathe Keyed Spindle Shaft Maybe Bridgeport or Cincinnati
$149.99
Milling Machine Lathe Worm Drive Spindle Shaft Arm Maybe Bridgeport Cincinnati
Milling Machine Lathe Worm Drive Spindle Shaft Arm Maybe Bridgeport Cincinnati
$299.99
South Bend 14 1 2 145 Lathe Headstock Spindle Take Up Nut and Washer
South Bend 14 1 2 145 Lathe Headstock Spindle Take Up Nut and Washer
$34.99
Clausing 5914 or 5900 Series SPINDLE
Clausing 5914 or 5900 Series SPINDLE
$325.00
Emco Maximat Super 11 Lathe ELIN 3 Phase 220 VAC Spindle Motor 0301C
Emco Maximat Super 11 Lathe ELIN 3 Phase 220 VAC Spindle Motor 0301C
$247.50
THEMAC TOOL POST GRINDER J40 2 Spindles NICE
THEMAC TOOL POST GRINDER J40 2 Spindles NICE
$239.00
10 12 Atlas Craftsman Lathe Headstock Spindle
10 12 Atlas Craftsman Lathe Headstock Spindle
$40.00
MT4 Spindle to MT2 Arbor Morse Taper Adapter Reducing Drill Sleeve Fit Lathe
MT4 Spindle to MT2 Arbor Morse Taper Adapter Reducing Drill Sleeve Fit Lathe
$12.43
NICE ORIGINAL LOGAN 10 MODEL 200 LATHE HEADSTOCK SPINDLE ASSEMBLY
NICE ORIGINAL LOGAN 10 MODEL 200 LATHE HEADSTOCK SPINDLE ASSEMBLY
$149.95
MACHINIST LATHE TOOL MILL Machinist Diamond Grinding Wheel with Spindle
MACHINIST LATHE TOOL MILL Machinist Diamond Grinding Wheel with Spindle
$89.99
28 37 X 120 LANSING G 28 HOLLOW SPINDLE ENGINE LATHE 9 1 4 THROUGH HOLE
28 37 X 120 LANSING G 28 HOLLOW SPINDLE ENGINE LATHE 9 1 4 THROUGH HOLE
$39,500.00
SUPER PRECISION COLLET CNC MILLING LATHE TOOL AND SPINDLE MOTOR HQ ER11 1 16
SUPER PRECISION COLLET CNC MILLING LATHE TOOL AND SPINDLE MOTOR HQ ER11 1 16
$0.95
Lathe Spindle Belt C raftsman 6 Clausing Corp 051 075 Lathe Belt 71S NOS
Lathe Spindle Belt C raftsman 6 Clausing Corp 051 075 Lathe Belt 71S NOS
$29.99
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
$3.50
Cnc Millling Machine lathe ER20 Straight Shank Extend 150mm spindle Dia 20MM
Cnc Millling Machine lathe ER20 Straight Shank Extend 150mm spindle Dia 20MM
$42.42
Cnc Mill Lathe Router ER25 Collet Straight Shank Extend 150mm spindle Dia 25MM
Cnc Mill Lathe Router ER25 Collet Straight Shank Extend 150mm spindle Dia 25MM
$33.92
Cnc Millling Machine lathe ER11 Straight Shank Extend 150mm spindle Dia 12MM
Cnc Millling Machine lathe ER11 Straight Shank Extend 150mm spindle Dia 12MM
$37.32
CUSHMAN REF 60234D3 3 JAW CHUCK 5 Lathe Chuck Direct Mount D1 3 Spindle
CUSHMAN REF 60234D3 3 JAW CHUCK 5 Lathe Chuck Direct Mount D1 3 Spindle
$215.00
15pcs ER25 collet set 2mm to 16mm for CNC milling lathe tool and spindle
15pcs ER25 collet set 2mm to 16mm for CNC milling lathe tool and spindle
$41.99
NEW 3MT 0000197 CNC PRECISION LONG SPINDLE LATHE LIVE CENTER MORSE TAPER
NEW 3MT 0000197 CNC PRECISION LONG SPINDLE LATHE LIVE CENTER MORSE TAPER
$20.42
ER11 SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR 1 4
ER11 SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR 1 4
$0.99
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 10MM
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 10MM
$1.11
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 4MM
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 4MM
$1.11
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 8MM
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 8MM
$1.11
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 1 8
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 1 8
$1.11
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 30MM
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 30MM
$1.11
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 1 16
SUPER PRECISION COLLET FOR CNC MILLING LATHE CHUCK TOOL SPINDLE MOTOR ER16 1 16
$1.11
ER11 Precision 1 7mm Spindle Motor Collet set CNC Milling Lathe Tool Workholding
ER11 Precision 1 7mm Spindle Motor Collet set CNC Milling Lathe Tool Workholding
$11.48
ER11 Collet Set 1 7mm for Spindle Motor CNC Milling Lathe Tool Workholding
ER11 Collet Set 1 7mm for Spindle Motor CNC Milling Lathe Tool Workholding
$11.49
Updated ER11 Collet Set 1 7mm for Spindle Motor CNC Milling Lathe Tool
Updated ER11 Collet Set 1 7mm for Spindle Motor CNC Milling Lathe Tool
$11.56
ER11 Precision 1 7mm Spindle Motor Collet set CNC Milling Lathe Tool Workholding
ER11 Precision 1 7mm Spindle Motor Collet set CNC Milling Lathe Tool Workholding
$11.61
MT5 Spindle to MT4 Arbor Morse Taper Adapter Reducing Drill Sleeve For Lathe
MT5 Spindle to MT4 Arbor Morse Taper Adapter Reducing Drill Sleeve For Lathe
$24.32

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