Specification of

TOKO ALVA PRIMA LTC GLODOG

PT ALVA PRIMA HABASIT - AMMERAAL CONVEYOR BELT PVC PU BLET

EMAIL : ALVAPRIMA@CBN.NET.ID

ain Coupling

Features

1. Simple structur

e

A roller chain coupling consists

of one duplex roller chain and

two sprockets for a simplex

chain. Handling is very simple

as both the shafts (driving

shaft and driven shaft) can be

connected and disconnected

by inserting or removing

connecting pins (cotter type).

2. Easy alignment

Owing to the play between the respective components

of the chain and the play between the roller chain and

the sprockets, the eccentricity and angle error can be

generally allowed as follows:

3. Small but powerful

Since a powerful roller chain is engaged with the

sprockets at all the teeth, a large torque can be

transmitted, though the coupling itself is smaller than

other kinds of couplings.

4. Excellent durability

The roller chain is made of heat-treated steel and

manufactured precisely and solidly to the highest

manufacturing standard. The durability is outstanding

and little time is required for maintenance as the

sprockets have induction-hardened special teeth, and

are always engaged with the roller chain.

5. Pr

otection of machine

Rational flexibility decreases vibration, overheating and

wear of the bearings caused by the eccentricities and

angle errors of the shafts.

Standard housing

The standard housings for

No. 8022 or smaller are made

of aluminum alloy die casting,

and those for No. 10020 or

larger are made of aluminum

alloy casting. Installation of

housings has the following

advantages.

1. Advantages of housing

¡

Holding of lubrication

Since a roller chain coupling rotates with flexibility,

the teeth of the roller chain and sprockets slide

slightly during operation. So, they must be kept

lubricated for prevention of wear as much as

possible. The housing functions as a grease box for

the lubrication.

¡

Prevention of grease scattering

Especially in high speed rotation, grease may be

scattered by centrifugal force. The housing functions

as a protector that prevents this.

¡

Protection from dust and moisture (corrosive atmosphere)

When a roller chain coupling is used in a wear-

causing or corrosive circumstances, the chain life is

extremely shortened unless the coupling is perfectly

shielded from the circumstances. The housing

functions to protect the roller chain coupling,

preventing the shortening of life.

¡

High safety and neat appearance

Since the housing has no protrusions outside, it is

safe even if it rotates with the roller chain coupling. It

is also neat in appearance. (To avoid possible injury,

do not touch the housing when rotating.)

2. Structur

e

The roller chain coupling can be split in the direction

perpendicular to the shafts. The hole on the driving

shaft side of the housing firmly holds the coupling's

sprocket hub. The hole on the driven shaft side keeps a

clearance of 1 mm or more from the sprocket hub to

maintain flexibility of the coupling. Oil leakage from this

portion is prevented by a seal ring.

¡

Eccentricity

ε

:

Up to 2% of the roller chain pitch

When the roller chain coupling is used for high speed rotation (in the range of

lubrication types B and C), keep the allowances less than half of the above.

¡

Angle error

α

: Up to 1°

¡

Always wear clothing suitable for work and proper

protection (safety glasses, safety shoes, etc.).

¡

Strictly observe Section 1 "General standards

(prevention of danger by motors, revolving shafts,

etc.), Chapter 1, Part 2 of Occupational Safety and

Health Regulations.

¡

Be sure to switch off the electric power source or any

other power source before starting maintenance

work, and ensure that the power is never accidentally

switched on. Furthermore, make sure not to allow

your clothes or any parts of the body to be caught by

the chain or sprockets, or by any other nearby

equipment.

¡

Be sure to install a chain housing for type C and type

B (see "Table of Lubrication Types").

¡

For installing the roller chain coupling into a high-

speed machine or heavily vibrating machine, coat the

bolts with a loosening preventive.

¡

Install a safety cover to prevent any unexpected flying

of loosened bolts, or scattering of a broken housing

or chain.

¡

Never partially replace or re-use the coupling as its

strength will be lowered, causing damage or

destruction. Furthermore, since the coupling is heat-

treated, never modify the cotter holes or any other

parts. When replacement is necessary, replace the

roller chain coupling or housing as a set respectively.

¡

Noise during operation may be caused by malfunction

and the unit may need to be replaced. Immediately

switch off the power, and check the cause.

For safe

work

Cautions

Housings

and safety

covers

Inhibition of

modification,

re-use, and

partial

replacement

Noise

ε α

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