Norton Construction Product Catalog - Dynatech

DR320 AND DR424 CORE DRILL RIGS
TECHNICAL SPECIFICATIONS DR320 DR424
Product Number 701846 30019 3 701846 30021 6
Gears 1 1
Motor Type Norton Norton
Motor Specification DR320 DR424
Voltage 115 volts 115 volts
Cycle*/Current/Phase 60 Hz/AC/1 60 Hz/AC/1
Amperage 20 Amp 20 Amp
RPM 850 650
Spindle Thread Size 1-1/4"-7 UNC 1-1/4"-7 UNC
Base – Combo – in. (mm) LxW 16-17/32"x11-13/16" (420x300) 19-1/4"x12-1/4" (490x310)
Column Length – in. (mm) 31-1/2" (800) 32-11/16" (830)
Slide Carriage One Piece Aluminum Carriage, Rack and Pinion, Carriage Lock
Weight Crated – lbs. (kg) 44 lbs (20 kg) 47 lbs (21.3 kg)
Weight Uncrated – lbs (kg) 34 lbs (15.5kg) 37-1/2 lbs (17 kg)
RECOMMENDED BIT SIZES
Low – in. (mm) N/A N/A
High – in. (mm) 1" to 6" (25.4 to 152) 1" to 6" (25.4 to 152)
ACCESSORY
Vacuum Base for DR320 701846 30020 9
*= DATA PROVIDED BY ENGINE MANUFACTURER
Core Bits
Minimum and Maximum
Recommended Operating
Speeds
BIT DIAMETER MINIMUM IDEAL MAXIMUM
INCHES RPM RPM PRM
1" 2,400 3,200 4,000
2" 1,200 1,600 2,000
3" 800 1,050 1,300
4" 600 800 1,000
5" 475 640 800
6" 400 530 665
7" 340 450 600
8" 300 400 500
10" 240 320 400
12" 200 265 330
14" 170 225 285
16" 150 200 250
18" 130 175 220
20" 120 160 200
24" 100 130 165
26" 90 125 150
30" 80 105 130
32" 75 100 125
34" 70 95 120
36" 65 85 110
40" 60 80 100
42" 55 75 95
97
CORE DRILL