14 Grinding Angle Adjustmentl
Adjustment of the length A between adjustable stop and knife-edge
for a grinding edge !
at a preset of the distance S between support-top and stone
Table 8. Stone diameter=180 mm
S= 65 70 75 80 85 90 95 100 105 110 115 120 125
!(°) Adjustable length A (mm)
10 118 124 130 135 141 147 153 158 164 170 175 181 186
11 116 122 128 134 140 146 151 157 163 168 174 179 185
12 115 121 127 133 139 144 150 156 161 167 172 178 183
13 114 120 126 131 137 143 149 154 160 166 171 177 182
14 112 118 124 130 136 142 147 153 159 164 170 175 181
15 111 117 123 129 135 140 146 152 157 163 168 174 179
16 110 116 122 128 133 139 145 150 156 162 167 173 178
17 109 115 120 126 132 138 143 149 155 160 166 171 177
18 107 113 119 125 131 137 142 148 153 159 164 170 175
19 106 112 118 124 130 135 141 147 152 158 163 169 174
20 105 111 117 123 128 134 140 145 151 156 162 167 173
21 104 110 116 122 127 133 139 144 150 155 161 166 172
22 103 109 115 120 126 132 137 143 149 154 160 165 170
23 102 108 114 119 125 131 136 142 147 153 158 164 169
24 101 107 112 118 124 130 135 141 146 152 157 163 168
25 100 106 111 117 123 128 134 140 145 151 156 161 167
26 99 105 110 116 122 127 133 138 144 149 155 160 166
27 98 104 109 115 121 126 132 137 143 148 154 159 165
28 97 103 108 114 120 125 131 136 142 147 153 158 164
29 96 102 107 113 119 124 130 135 141 146 152 157 162
30 95 101 106 112 118 123 129 134 140 145 151 156 161
© 2013 Ton Nillesen 3
3. The knife jigs
This document refers to the knife grinding jig “Knife Jig SVM-45” (see Fig. 3.1) and
the jig for longer knfes “long Knife Jig SVM-140” (see Fig. 3.2).
The jigs rest on the “Universal Support” of which the position with respect to the
grinding stone can be adjusted. See also Fig. 4.1.
Fig. 3.1: Knife Jig SVM-45 Fig. 3.2: long Knife Jig SVM-140
Apart from the adjustable clamp ('1' in Fig. 3.3) for
holding knives of any thickness, the jigs comprise
an adjustable stop (2) by which the distance from
the knife edge to the universal support can be ad-
justed to the desired length. Thus we have the fol-
lowing parameters for adjusting the grinding angle:
• the distance from the universal support to the
stone
• the distance from the knife edge (in the clamp)
to the adjustable stop
4. Adjustment of the grinding angle
The adjustment procedure will be explained with reference to Fig. 4.1, which gives
the notation of the available parameters.
! = grinding angle.
A = Adjustable length between the adjustable stop and the knife edge
K = length of jig between support-top and Knife edge
S = distance from support-top to the Stone
R
1
, R
2
= Radius of the stone=R
D = Distance from support to the centre of the stone (D=S+R
2
=S+R)
Notes:
• The reference point on the jig for the distances K and S (also D) is above the
centre of the universal support.
• The maximum value of D is 215 mm
• Length between stop and clamp edge is adjustable from 108 to 125 mm
• Diameter of support bar is 12 mm
• The stone diameter varies from 250 mm to a recommended minimum of
180 mm.
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