Silver Deming

i need to cut a perfect 1" circle in a piece of 1/4 aluminum.what is the best tool to use?

Well, first off, good luck trying to pull a Greenlee punch through .250 thick aluminum (just kidding, don't try) you need a drill press and access to a good quality 1" Silver & Deming HSS drill bit. Work your way up to the 1" bit by drilling a pilot hole and then drill the 1" hole.

Oh, by the way, if you want it to be "perfect", drill it undersize (15/16") and then use a 1" reamer, that will get you within +/- .0001". Looks like most of these other answers come from woodworkers.

Discover Silver Deming On eBay Below:

Machinist 43 64 X 1 2 Shank SILVER  DEMING BIT SD 3 Flats 118 deg point
Machinist 43 64 X 1 2 Shank SILVER DEMING BIT SD 3 Flats 118 deg point
$14.20
17pc Silver  Deming Drill Bit Set Black  Gold finish w Aluminum case10240B
17pc Silver Deming Drill Bit Set Black Gold finish w Aluminum case10240B
$64.90
Silver and Deming Drill Bit Set with 1 2 inch Diameter Tri flat Shank  33 Piece
Silver and Deming Drill Bit Set with 1 2 inch Diameter Tri flat Shank 33 Piece
$133.80
17 32 HSS Silver  Deming Drill Bit 1 2 Shank 1424R USA Morse 17032 H13
17 32 HSS Silver Deming Drill Bit 1 2 Shank 1424R USA Morse 17032 H13
$17.25
Silver  Deming 32 PC Ser 33 64 1 Black  Gold SD  HSS Dill Bit 118 Split
Silver Deming 32 PC Ser 33 64 1 Black Gold SD HSS Dill Bit 118 Split
$245.00
01 081 116 High Speed Steel Silver  Deming Drills Drill Point Angle 118 Degr
01 081 116 High Speed Steel Silver Deming Drills Drill Point Angle 118 Degr
$124.88
25 32 L575 HSS Silver  Deming Drill  c
25 32 L575 HSS Silver Deming Drill c
$26.94
INTERSTATE 53 64 08281 118 Degree Cobalt Silver  Deming Drill G6
INTERSTATE 53 64 08281 118 Degree Cobalt Silver Deming Drill G6
$29.95
25 32 Black  Gold 1 2Shank Silver  Deming Drill 118Split Point YG1 D1191050
25 32 Black Gold 1 2Shank Silver Deming Drill 118Split Point YG1 D1191050
$29.77
Cobalt Silver  Deming 57 64 Drill Bit NOS
Cobalt Silver Deming 57 64 Drill Bit NOS
$32.99
Cobalt Silver  Deming 55 64 Drill Bit NOS
Cobalt Silver Deming 55 64 Drill Bit NOS
$32.99
19 32 1 2 Reduced Shank HSS Silver and Deming Drill Bit Qualtech
19 32 1 2 Reduced Shank HSS Silver and Deming Drill Bit Qualtech
$12.89
Silver  Deming 47 64 Drill Bit 303C NOS
Silver Deming 47 64 Drill Bit 303C NOS
$32.99
Cobalt Silver  Deming 43 64 Drill Bit AK70 043 NOS
Cobalt Silver Deming 43 64 Drill Bit AK70 043 NOS
$32.99
Cobalt Silver and Deming Drill Bit 1 2 Shank 43 64 1000C143 NOS
Cobalt Silver and Deming Drill Bit 1 2 Shank 43 64 1000C143 NOS
$32.99
Silver  Deming Drill Bit 13 16 D ARSD13 16 NOS
Silver Deming Drill Bit 13 16 D ARSD13 16 NOS
$32.99
TTC 01 081 928 22M Cobalt Silver  Deming 135 Drill
TTC 01 081 928 22M Cobalt Silver Deming 135 Drill
$40.62
17 32 Cobalt 1 2 Shank Silver  Deming Drill 135Notched Point USA 303C 17 32
17 32 Cobalt 1 2 Shank Silver Deming Drill 135Notched Point USA 303C 17 32
$32.44
27 32 Cobalt 1 2 Shank Silver  Deming Drill 135Notched Point USA 303C 27 32
27 32 Cobalt 1 2 Shank Silver Deming Drill 135Notched Point USA 303C 27 32
$62.32
9 16 Silver  Deming Cobalt Drill Bit USA NEW
9 16 Silver Deming Cobalt Drill Bit USA NEW
$23.97
5 8 Silver  Deming Cobalt Drill Bit USA NEW
5 8 Silver Deming Cobalt Drill Bit USA NEW
$28.28
21 32 Silver  Deming Cobalt Drill Bit USA NEW
21 32 Silver Deming Cobalt Drill Bit USA NEW
$30.45
3 4 Silver  Deming Cobalt Drill Bit USA NEW
3 4 Silver Deming Cobalt Drill Bit USA NEW
$37.98
1 Silver  Deming Cobalt Drill Bit USA NEW
1 Silver Deming Cobalt Drill Bit USA NEW
$62.28
x2 iTM 201SD4864 Silver Deming Drill Bit 3 4 And 1 Silver Deming Bit
x2 iTM 201SD4864 Silver Deming Drill Bit 3 4 And 1 Silver Deming Bit
$18.65
1 2 SHANK HSS SILVER  DEMING DRILL SET 1 1 16 1 1 2 8 PCS SET 504 8 12 NEW
1 2 SHANK HSS SILVER DEMING DRILL SET 1 1 16 1 1 2 8 PCS SET 504 8 12 NEW
$68.00
New 1 1 8 Republic HSS Silver and Deming Drills
New 1 1 8 Republic HSS Silver and Deming Drills
$8.00
5 Piece Silver  Deming Drill Bit Set Large Sizes Demming 1 2 Reduced Shank
5 Piece Silver Deming Drill Bit Set Large Sizes Demming 1 2 Reduced Shank
$30.00
21 32 drill bit x 6 Length Silver  Deming 1 2 shank  55442 USA unused
21 32 drill bit x 6 Length Silver Deming 1 2 shank 55442 USA unused
$21.75
Machinist 19 32 X 1 2 Sk SILVER  DEMING DRILL BIT SD HSS
Machinist 19 32 X 1 2 Sk SILVER DEMING DRILL BIT SD HSS
$12.30
Machinist 39 64 X 1 2 Sk SILVER  DEMING DRILL BIT SD HSS
Machinist 39 64 X 1 2 Sk SILVER DEMING DRILL BIT SD HSS
$12.50
Irwin Hanson 91136 9 16 Silver and Deming Drill Bit Black Oxide High Speed Stee
Irwin Hanson 91136 9 16 Silver and Deming Drill Bit Black Oxide High Speed Stee
$5.00
Machinist 25 32 1 2 SHANK SILVER  DEMING BIT SD Drill for 3 8 18 pipe tap
Machinist 25 32 1 2 SHANK SILVER DEMING BIT SD Drill for 3 8 18 pipe tap
$17.45
1 2 SHANK COBALT SILVER  DEMING DRILL SET 32PCS SET NEW
1 2 SHANK COBALT SILVER DEMING DRILL SET 32PCS SET NEW
$239.00
Machinist 1 x 1 2 shank SILVER  DEMING BIT SD3 Flats on shank 118 deg point
Machinist 1 x 1 2 shank SILVER DEMING BIT SD3 Flats on shank 118 deg point
$24.60
57 64 Black  Gold 1 2Shank Silver  Deming Drill 118Split Point YG1 D1191057
57 64 Black Gold 1 2Shank Silver Deming Drill 118Split Point YG1 D1191057
$36.40
RUTLAND Silver  Deming Drill 19 32 x 1 2 Shank 118 HSS 10190238
RUTLAND Silver Deming Drill 19 32 x 1 2 Shank 118 HSS 10190238
$18.00
RUTLAND Silver  Deming Drill 53 64 x 1 2 Shank 118 HSS Oxide 10190253
RUTLAND Silver Deming Drill 53 64 x 1 2 Shank 118 HSS Oxide 10190253
$24.00
RUTLAND Silver  Deming Drill 5 8 x 1 2 Shank 118 HSS Oxide 10190240
RUTLAND Silver Deming Drill 5 8 x 1 2 Shank 118 HSS Oxide 10190240
$19.00

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