Churchill RH8 Gear Hobbing

Model

RH8

Maximum outside Dia-using 3in(76.2mm) dia. Hob

8 in (203-2 mm)

Maximum length of travel

8 in (203-2 mm)

Maximum DP (Mod) cast iron or steel

Maximum height, work spindle to Tailstock centre

37 in (940 mm)

Minimum height, work spindle to centre of Hob Arbor

7 in (191 mm)

Maximum height, work spindle to centre of Hob Arbor

15 in (393 mm)

Max. distance centre of work spindle to centre of Hob Arbor

5 in (139.7 mm)

Min. Distance centre of work spindle to centre of Hob Arbor

1 ½ in (38 mm)

Hob Arbor Dia (STD)

1 1/4 in (32 mm)

Hob Arbor keyway

5/16 in x 5/32 in (7.93x3.97 mm)

Hob Head Swivels

0^o to 90^o R & LH

Maximum Hob outside Dia.

4 in (102 mm)

Hob Speeds

3:1 ratio Hob Head, 70 to 260 rev/min
2:1 ratio Hob Head, 200 to 500 rev/min

Vertical feeds per revolution of work

.006in to .250in (0.152 to 6.35mm)

In feed rate of Hob Slide per minute

.010in to 1.80in (0.254 to 45.7mm)

Main drive motor

7 1/2 HP, 1500 rev/min

Rapid transverse motor

2 1/2 HP, 2800 rev/min

Hydraulic pump motor

1 1/2 Hp 1000 rev/min

Approximate floor area

22 1/2 sq. ft (2.069 sq m)

Machine heights

84in (2134mm)

100in (2540mm)

Shipping specification

Nett 3 tons 15 cwts, (3810 kg)
Gross 4 tons 8 cwts, (4470 kg)

Case dimensions

5ft 8in x 5ft 8in x 9ft 0in (1727mm x 1727mm x 2743mm)