Description

Worm Gearbox

• Single stage / Double stage
• Small Worm Gearbox Models like C.D. 50, 60, 75, 85, 100 mm and Ratio 30/1 or 40/1 are usually available in stock or can be made on short notice by customer.

Worm gearboxes are having cast iron gear case, worm shaft is of Alloy Steel, duly hardened and tempered. The worm wheel is made of Chill Cast Phosphorous Bronze.

worm gear boxes have liberal ribbing for increasing heat dissipation area, streamlined sump for carrying more oil and fan of ample size which is effective in both side of rotation.

Design Standards:
Wherever applicable, British as well as Indian Design standards are used. Worm Shafts conform to case- hardening Alloy Steels, Worm Wheels conform to phosphorous-bronze as per BS 1400, While Gear case conforms to C.I. Grade 20, IS210.

Worm & Worm Wheels:
The worm is made of case-hardening / alloy steel, duly hardened, ground and lapped and is integral with the shaft. Bearing journals ate accurately ground. Worm Wheels is made of chill cast phosphorous bronze and tightly fitted with the C.I. Centres. Worm Wheels teeth are generated on precision hobbing machines and high accuracy hobs.

Bearings:
The Worm and Worm Wheels are supported on Extra Heavy Duty Tappet roller anti friction bearings of ample margin of safety to allow adequate journals as well as thrust loads. Overhung loads arising Out of sprocket or pinion drive are generally permissible because the gear case and bearing are designed for this duty. In case of heavy overhung load, and extra roller bearing can be provided.

Wheel Shafts:
The Worm wheel Shafts are made of high tensile carbon steel, duly hardened and ground. It is of large diameter of carry the torsional as well as the bending loads which may be induced by overhung drives.

Lubrication:
Lubrication in Worm gearbox is by splash of oil from the sump. Thus, no special care is required except for the occasional oil topping of the oil to the required level. An oil filler cum breather plug is provided along with the drain plug and level plug. Oil seals of appropriate size are provided on all input and output shafts. For very low input speed of below 50 RPM, and heavy loads in sizes above 350 mm, forced lubrication is required.

Cooling:
Air cooling is effected by means of standard propylene or metal fans which direct air over the ribbed surface of the Case. The fan is designed to operate in both the direction of rotation and is so arranged in conjunction with the ribbing of the case to allow maximum heat dissipation.

Overload Ratings:
All the Components of the Gear Unit are so designed that they can withstand
100% overload for 15 seconds
50% overload for one minute
40% overload for 15 minutes
25% overload for 1 hour

 worm gearboxes are available in vast range of Models suitable for many industrial requirement.

We manufacture single reduction worm gearbox as well as double stage reduction worm gearbox  with ratios from 5:1 to 4900:1 and can be manufactured according to customer specifications, drawing and requirements.

Adaptable worm gear box, range from CD 25mm to 85mm

Worm gearboxes have input shafts that are positioned perpendicular to the output shafts.