Spindle Speeds - Delta 18-900L Instruction Manual

18" (457 mm) drill press with lasers
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SPINDLE SPEEDS

Sixteen spindle speeds are available on the drill press. Fig. 38 illustrates the belt positions and the corresponding
speeds.
Also, the chart suggests shows what speeds to use with certain materials and bit sizes. Recommended operating
speeds are in RPMs.
ACCESSORY
TWIST DRILL BITS
1/16"-3/16" (1.5-5 mm)
1/4"-3/8" (6.4-9.5 mm)
7/16"-5/8" (11-16 mm)
11/16"-1" (17-25.4 mm)
BRAD-POINT BITS
1/8" (3.18 mm)
1/4" (6.4 mm)
3/8" (9.5 mm)
1/2" (12.7 mm)
5/8" (15.9 mm)
3/4" (19 mm)
7/8" (22.2 mm)
1" (25.4 mm)
FORSTNER BITS
1/4"-3/8" (6.4-9.5 mm)
1/2"-5/8" (12.7-15.9 mm)
3/4"-1" (19-25.4 mm)
1-1/8"-1-1/4" (28.6-31.8 mm)
1-3/8"-2" (35-50.8 mm)
HOLE SAWS
1"-1-1/2" (25.4-38.1 mm)
1-5/8"-2" (41.3-50.8 mm)
2-1/8"-2-1/2" (54-63.5 mm)
SPADE BITS
1/4"-1/2" (6.4-12.7 mm)
5/8"-1" (15.9-25.4 mm)
1-1/8"-1-1/2" (35-38.1 mm)
MATERIAL
SOFT WOOD
HARD WOOD
3000
3000
3000
1460
1460
840
840
510
1650
1150
1650
1150
1650
840
1650
840
1650
540
1460
260
1150
260
1150
260
2260
750
2260
540
1460
540
1150
260
540
260
540
330
540
260
260-540
NR
2190
1460
1650
1460
1460
1150
17
ACRYLIC
BRASS
ALUMINUM
2260
3000
3000
2190
1150
2260
1460
840
1460
NR
440
1150
1460
NR
NR
1460
NR
NR
1460
NR
NR
1150
NR
NR
840
NR
NR
840
NR
NR
540
NR
NR
260
NR
NR
NR
NR
NR
260
NR
NR
260
NR
NR
260
NR
NR
NR
NR
NR
NR
260
260
NR
170
260
NR
170
260
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR - NON RECOMMANDÉ / NO RECOMENDADO
Fig. 38
STEEL
3000
1150
540
330
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR

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