13 | SST KNURLING TOOL HOLDERS | ||
BLANK DIAMETER CALCULATIONS | |||||
For Circular Pitch Knurls | |||||
FIRST: | CORRECTION FACTOR TABLE: (C.F.) | ||||
You will need the following information: | KNURL TPI | APPROX. C.F. | |||
12-19 | .010 | ||||
APPROX. BLANK DIAMETER: | |||||
20-29 | .007 | ||||
KNURL DIAMETER: | 30-39 | .005 | |||
NUM. OF TEETH ON KNURL: | 40-49 | .003 | |||
KNURL CORRECTION FACTOR: | 50-80 | .002 | |||
APPROX. # OF TEETH ON PART = | APPROX. BLANK DIAMETER x NUM. OF TEETH ON KNURL | ||||
(KNURL DIAMETER + C.F.) | |||||
RECOMMENDED BLANK DIAM. = | # OF TEETH ON PART x (KNURL DIAM + C.F.) | ||||
# OF TEETH ON KNURL | |||||
BLANK DIAMETER CALCULATIONS | |||||
For Diametral Pitch Knurls |
American Standard ASA B94.6-1984 describes the diametral pitch knurl system. Diametral pitch knurls are designed to track uniformly on fractional size stock up to 1" in multiples of 1/32" or 1/64". They are held to closer tolerances for this purpose.
D.P. | Blank Diameters for Tracking with | The number of teeth that will be rolled can be easily calculated by | |
Diametral Pitch Knurls (DP) | multiplying the blank diameter by the Diametral Pitch (DP) of the knurl. | ||
64 | every 1/64" | ||
Example: On 1/2" diameter stock: | |||
96 | every 1/32" (also every 1/96") | ||
A 96 D.P. knurl will roll 1/2 x 96 = 48 TEETH | |||
128 | every 1/64" (also every 1/128") | ||
160 | every 1/32" (also every 1/160") |
Blank diameters for diametral pitch knurling dies are easily calculated as they are always common fractional sizes. The formula is as follows:
RECOMMENDED BLANK DIAM. = | # OF TEETH ON PART | |||
DIAMETRAL PITCH | ||||
NUMBER OF TEETH ON STRAIGHT KNURLS | |||||||||||||||||||||||||||||||||
TEETH PER INCH | |||||||||||||||||||||||||||||||||
Diam. | Series | 8 | 10 | 12 | 14 | 15 | 16 | 18 | 19 | 20 | 21 | 22 | 24 | 25 | 28 | 29 | 30 | 32 | 33 | 34 | 35 | 38 | 40 | 41 | 47 | 35 | 50 | 53 | 60 | 70 | 80 | 90 | 100 |
5/16" | BP | 19 | 25 | 29 | 34 | 39 | 49 | 52 | 59 | 69 | 79 | 89 | 99 | ||||||||||||||||||||
1/2" | EP | 25 | 30 | 31 | 32 | 34 | 37 | 38 | 43 | 44 | 47 | 49 | 52 | 55 | 59 | 63 | 65 | 73 | 79 | 84 | 94 | 109 | 125 | 155 | |||||||||
EQ | |||||||||||||||||||||||||||||||||
5/8" | GK | 23 | 27 | 29 | 31 | 34 | 37 | 39 | 41 | 43 | 47 | 49 | 55 | 56 | 59 | 63 | 65 | 68 | 73 | 78 | 81 | 92 | 68 | 98 | 103 | 116 | 135 | 155 | |||||
GR | |||||||||||||||||||||||||||||||||
KN | 19 | 23 | 28 | 34 | 35 | 38 | 42 | 45 | 47 | 50 | 51 | 57 | 59 | 65 | 68 | 71 | 75 | 77 | 80 | 82 | 89 | 94 | 97 | 82 | 117 | 125 | 140 | 165 | 189 | 235 | |||
3/4" | KP | ||||||||||||||||||||||||||||||||
KR | |||||||||||||||||||||||||||||||||
7/8" | MT | 33 | 38 | 44 | 51 | 55 | 66 | 69 | 79 | 82 | 88 | 95 | 110 | 113 | 136 | 164 | 219 | ||||||||||||||||
1" | OU | 31 | 37 | 44 | 50 | 60 | 61 | 67 | 69 | 75 | 78 | 87 | 95 | 101 | 103 | 110 | 124 | 142 | 158 | 187 | 249 | 284 | |||||||||||
1-1/4" | PH | 39 | 47 | 55 | 63 | 79 | 95 | 97 | 117 | 125 | 136 | 156 | 196 | ||||||||||||||||||||
NUMBER OF TEETH ON DIAGONAL KNURLS | |||||||||||||||||||||||||||||||||
TEETH PER INCH | |||||||||||||||||||||||||||||||||
Diam. | Series | 8 | 10 | 12 | 14 | 15 | 16 | 18 | 19 | 20 | 21 | 22 | 24 | 25 | 28 | 29 | 30 | 32 | 33 | 34 | 35 | 38 | 40 | 41 | 47 | 35 | 50 | 53 | 60 | 70 | 80 | 90 | 100 |
5/16" | BP | 17 | 21 | 26 | 29 | 34 | 43 | 45 | 59 | 68 | |||||||||||||||||||||||
1/2" | EP | 16 | 22 | 25 | 27 | 32 | 34 | 40 | 43 | 47 | 55 | 68 | 107 | ||||||||||||||||||||
EQ | |||||||||||||||||||||||||||||||||
5/8" | GK | 17 | 19 | 24 | 27 | 34 | 36 | 42 | 49 | 52 | 58 | 68 | 86 | 101 | 117 | 135 | |||||||||||||||||
GR | |||||||||||||||||||||||||||||||||
3/4" | KN | 16 | 20 | 25 | 34 | 33 | 41 | 50 | 49 | 51 | 59 | 61 | 65 | 77 | 80 | 71 | 81 | 102 | 109 | 122 | 143 | 163 | 203 | ||||||||||
KP | |||||||||||||||||||||||||||||||||
KR | |||||||||||||||||||||||||||||||||
7/8" | MT | 33 | 38 | 47 | 67 | 59 | 71 | 95 | 165 | ||||||||||||||||||||||||
1" | OU | 26 | 33 | 46 | 45 | 53 | 68 | 81 | 87 | 103 | 108 | ||||||||||||||||||||||
1-1/4" | PH | 27 | 33 | 41 | 55 | 53 | 68 | 82 | 85 | 103 | 135 | 169 |
1-800-642-2024 | LOCAL 508-755-5302 | FAX 508-755-4522 | sales@staffordspecialtools.com |