Jet ghd-20 Guía Del Usuario
12
Drill Speed Chart
There are many variables when determining what RPM to use. Use the following drill speed chart to
choose the approximate drill speed for the size bit, and type of material to be drilled. The chart is a
general reference for a 90° cut in the workpiece using HSS (high-speed steel) tools. For more detailed
information refer to the “Machinery’s Handbook.”
choose the approximate drill speed for the size bit, and type of material to be drilled. The chart is a
general reference for a 90° cut in the workpiece using HSS (high-speed steel) tools. For more detailed
information refer to the “Machinery’s Handbook.”
1/8” 1/4" 3/8” 1/2" 5/8” 3/4" 7/8” 1” 1-1/8”
1-1/4"
Aluminum
and Alloys
and Alloys
2,000 2,000 2,000 2,000
1224-
1834
1834
1016-
1528
1528
876-
1310
1310
764-
1146
1146
680-
1018
1018
612-
840
840
Copper Alloys
1833-
2000
2000
966-
2000
2000
611-
1782
1782
458-
1336
1336
366-
1069
1069
305-
891
891
261-
763
763
229-
668
668
203-
594
594
183-
534
534
Alloy Steels
611-
2000
2000
305-
1298
1298
203-
865
865
152-
649
649
122-
519
519
101-
432
432
87-
371
371
76-
324
324
67-
288
288
65-
259
259
Lubrication
Location Type Frequency
Top of spindle shaft under
plastic cap
plastic cap
#2 lithium based tube grease
Monthly
Quill and column
Machine tool oil
Daily
Lift rack
20W non-detergent oil
Weekly (clean rack with
kerosene before lubricating)
kerosene before lubricating)
Table lift
Gear grease
Twice yearly (clean and
regrease)
regrease)
Behind oil fill label left side of
head
head
Mobil DTE Heavy Medium
Change after 6 months and
annually thereafter. Capacity 1
Quart. Drain plug is located in
the cut away section on the
bottom side of the head
annually thereafter. Capacity 1
Quart. Drain plug is located in
the cut away section on the
bottom side of the head
Replacement Parts
Replacement parts are listed on the following pages. To order parts or reach our service department, call
1-800-274-6848, Monday through Friday (see our website for business hours, www.waltermeier.com).
Having the Model Number and Serial Number of your machine available when you call will allow us to
serve you quickly and accurately.
1-800-274-6848, Monday through Friday (see our website for business hours, www.waltermeier.com).
Having the Model Number and Serial Number of your machine available when you call will allow us to
serve you quickly and accurately.