Two-stage differentially-pumped
Rotary Platforms
Model DPRF600
Click photo for larger view.
360o continuous rotation at 1 X 10-11 torr
Includes fine adjust drive and 0.1o vernier scale
Extra-large bore for maximum clearance
Exclusive bearing seal reduces costly maintenance and prolongs life
Standard, full depth threads need no special fasteners
Optional integral half-nipple saves time, space and money
Excellent value - affordable price
(Click graphic for a bigger view)
              The excellent performance of our rotary platform coupled with a simple, low maintenance design gives maximum value. The fine adjust worm has bearings at both ends, thereby eliminating deflection and inaccuracies. Worm gear backlash is reduced to <0.05 degrees. The bolt holes on both flanges are tapped full depth for use with standard length flange hardware. This means no need to shorten standard fasteners. Fluorocarbon seals are double-differentially pumped to provide base pressures in the 10-11 Torr range and will withstand bakeouts up to 210 degrees C.

The integral half-nipple option, for mounting to an existing tapped flange, saves space, hardware, time and money. The DC motor option includes a variable speed drive controller and pendant switch. Stepper motor drives are also available.
Differentially-pumped Rotary Platforms
Model No.
Click link below
for graphic		 Flange
Size		 Clear
Bore		 Dim.
"A"		 Dim.
"B"		 Dim.
"C"		 Axial Load 
Capacity		 1/2 Nipple 
Option
(Add)		 DC Motor 
Option
(Add)		 Stepper
Motor
(Add)		 Price
(US Dollars)
(w/fine
adjust) 
Shipping weight
Without       -       With
1/2 nipple option
DPRF 275
2.75
(70)
1.53
(38)
4.50
(114)
1.98
(50.2
1.10
(28)
150 lbs
(68 kg)
$50
$1235
$795
$2775
11 lbs
(5 kg)
13 lbs
(6 kg)
DPRF 450
4.5
(114)
2.87
(72)
6
(150)
1.90
(48)
1.45
(36.8)
270 lbs
(122 kg)
$100
$1325
$935
$3650
15 lbs
(7 kg)
18 lbs
(8 kg)
DPRF 600
6.0
(150)
4.05
(102.3)
8.50
(216)
2.50
(63.5)
1.45
(36.8)
450 lbs
(204 kg)
$140
$1350
$1150
$4325
34 lbs
(16 kg)
39 lbs
(18 kg)
DPRF 800
8.0
(200)
6.05
(153)
10.50
(267)
2.62
(66.5)
1.60
(40.6)
600 lbs
(270 kg)
$185
$1450
$1350
$6395
47 lbs
(21 kg)
52 lbs
(24 kg)
DPRF 1000
10.0
(254)
8.05
(204)
12.80
(325)
2.75
(70)
1.60
(40.6)
1200 lbs
(545 kg)
$320
$1500
$1450
$9995
70 lbs
(32 kg)
77 lbs
(35 kg)
Stepper Motor Controller for any of the above, first axis*, add $1500*
*Additional axes (may be combined - consult factory), add $750.
Other sizes available on request            All sizes in inches (millimeters)
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Copyright © 2001-2005 McAllister Technical Services. All rights reserved.
Last Updated: October 2005