Universal dividing head UDG D-200

Universal dividing heads UDG-D-200
Under GOST 8615-69, the main size of dividing heads is the largest machining diameter D. The standard provides a series of six head sizes D = 160; 200; 250; 320; 400 and 500 mm. Model names: UDG-D-160, DD-200, UDG-250, UDG-400, UDG-500.
The worm gear ratio of these heads is 1: 40 (N=40), i.e. the head spindle makes one full revolution for 40 turns of the crank.
Workpiece circle division range - up to 400 parts, including prime numbers.
Universal dividing heads allow indexing by three methods: direct, simple and differential, and are used to equip milling machines in one-off and small-batch production.
Each machine size (by table width) should be matched with a specific dividing head size. For example, for No 2 knee-type milling machines (table width 320 mm) a dividing head with a maximum workpiece diameter of D = 250 mm is recommended, and for No 3 milling machines (table width 400 mm) - the UDG-D-320 dividing head, etc.

Dividing head UDG 200

The UDG 200 universal dividing head is used on metalworking machines (mainly milling machines) for direct, simple and differential indexing. The UDG 200 provides periodic rotation of parts. The number 200 in the designation is the largest workpiece diameter. The head model should match the machine table width. For example, the UDG 200 head suits a knee-type milling machine with a 250 mm table.

Operations performed with UDG heads

• direct indexing into 2, 3, 4, 6, 8, 12 and 24 parts;
• simple indexing into 2 to 2160 parts with gaps;
• differential indexing of a circle into 43 to 400 parts without gaps.
• milling of helical grooves with a lead of 25 to 3070 mm;
• various milling operations involving dividing a circle into unequal parts (in degrees).
• In addition, the heads are used for other work involving dividing a circle into parts and for various layout work.

UDG 200 specifications

Parameter	7036-0052
Distance from base to spindle face H, mm	235
Center height h, mm	105
Morse taper	3
Threaded spindle nose per GOST 9150 d0 8g	M39x3
Spindle swivel angle in the vertical plane:
down from the center line (a)	5
up from the center line (p)	95
d1 h5	40
Spindle bore diameter d2, mm	20,2
l	25
Worm gear ratio	1:40
Number of holes in the index plate:
on one side	16, 17, 19, 21, 23, 29, 30, 31
on the other side	33, 37, 39, 41, 43, 47, 49, 54
Self-centering chuck diameter, mm	125
Direct indexing dial graduation	15
Guide key width, mm	14
Change gear bore diameter d3 f9	20f9
Change gear module	1,5
Number of gears	25, 30, 35, 40, 50, 55, 60, 70, 80, 90, 100
Dividing head base dimensions LxB, mm	260x180

UDG scope of delivery

• Universal dividing head;
• Flange;
• 3-jaw chuck;
• Tailstock;
• Dead center

At the customer's request, the head can be supplemented with the following items:

• Steady rest;
• Change gear train for differential indexing;
• Change gear train for helical milling;
• Change gears;
• Driver dog.

Other UDG 200 specifications

Center height	105 mm
Maximum workpiece diameter	200 mm
GOST designation	7036-0051
Weight	50 kg
Version	With threaded spindle nose
Standard	GOST 8615-89
Lathe chuck diameter	125 mm