Yokota G400H-S, Instruction Manual

Page: 30 / 52

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● The designated applicable air pressure (the dynamic air
pressure with the gauge of air piping at free speed) is
0.6MPa(6kgf/cm2 or 85lb/in2). Do not apply excessive air
pressure, as it exceeds the specified max. allowable
peripheral speed, which is dangerous. Make sure to use
the tool with the air pressure less than 0.6Mpa (6kgf/cm2
or 85lb/in2). Furthermore, installation of pressure gauge
and regulator near the operating grinder is duly recom-
mended.
● Carry out visual inspection and sound check to find out
any breakage, deficiency, cracks, wear-out level or
breakage/lack of label with the grinding end attachment
such as grindstone. Do not use any of such an abnormal
grinding end attachment.
1800
Grindstone
Diameter
mm(in)
6 (1/4)
10 (3/8)
13 (1/2)
16 (5/8)
19 (3/4)
22 (7/8)
25 (1)
32 (1 1/4)
38 (1 1/2)
45 (1 3/4)
50 (2)
58 (2 1/4)
65 (2 1/2)
75 (3)
100 (4)
125 (5)
150 (6)
180 (7)
205 (8)
230 (9)
255 (10)
305 (12)
2000 2400 2700
Conversion Chart of Grindstone peripheral speed and RPM
rpm
rpm
Peripheral speed (m/min)
3000 3500 3800 4000 4300 4800
95,496
57,296
44,073
35,809
30,156
26,114
22,918
17,905
15,078
12,733
11,459
9,872
8,815
7,639
5,730
4,584
3,820
3,133
2,795
2,492
2,247
1,879
106,106
85,662
48,970
39,788
33,506
28,980
25,465
19,895
16,753
14,147
12,732
10,981
9,794
8,488
6,366
5,093
4,244
3,537
3,105
2,769
2,497
2,087
127,328
76,394
58,764
47,746
40,208
34,742
30,558
23,873
20,104
16,977
15,279
13,178
11,753
10,186
7,639
6,112
5,093
4,244
3,727
3,323
2,996
2,506
143,244
85,943
66,110
53,714
45,234
39,085
34,377
26,858
22,617
19,099
17,189
14,825
13,222
11,459
8,594
8,875
5,730
4,775
4,192
3,738
3,370
2,818
159,160
95,493
73,455
59,682
50,260
43,427
38,197
29,842
25,130
21,221
19,099
16,472
14,691
12,732
9,549
7,639
6,366
5,305
4,658
4,153
3,745
3,131
185,774
111,464
85,742
69,665
58,665
50,665
44,585
34,832
29,332
24,769
22,292
19,218
17,148
14,861
11,146
8,917
7,430
6,192
5,437
4,846
4,371
3,654
201,602
120,957
93,043
75,598
63,662
55,008
48,383
37,800
31,831
26,880
24,191
20,865
18,609
16,128
12,096
9,677
8,064
6,720
5,900
5,261
4,743
3,966
212,314
127,388
97,991
79,617
67,046
67,903
50,955
39,808
33,523
28,308
25,477
21,963
19,598
16,985
12,738
10,191
8,492
7,077
6,214
5,538
4,995
4,176
232,800
140,000
110,070
90,010
75,300
62,246
57,700
45,010
37,200
33,020
27,400
23,610
21,100
18,250
13,690
10,970
9,130
7,620
6,670
5,954
5,380
4,500
254,655
152,788
117,528
95,492
80,415
89,484
61,115
47,747
42,208
33,953
30,558
26,365
23,506
20,372
15,279
12,223
10,186
8,488
7,453
6,648
5,992
5,009