Page 1612 - MISUMI SINGAPORE Economy Series

[Technical Data]
Designing of Chain Drive Mechanism 4

Installation Way Horizontal Arrangement Lubrication
(A) Arrangement of Shafts The service life of roller chains depends heavily on
Horizontal Arrangement lubrication. Therefore, correct lubrication is extremely
Even when the shafts are arranged important. Today, as chains are increasingly run at higher
horizontally, the following points should Driving Side speeds, they need to be lubricated more efficiently.
be taken into account in terms of the (1)Good Benefits of Lubrication Oil
rotary direction of the shafts. In (2) and Oil applied into the space between pins, bushings and rollers
(3) shown, elongation of the chain may forms oil film. Which then helps to reduce wear of parts as well
prevent the chain links from leaving the Driving Side as absorb impact. Oil also cools down heat generated in the
sprocket teeth smoothly, resulting in (2)Not Good chain. Use good quality mineral oil to lubricate roller chains.
biting. In (3) shown, the load bottom and Recommended Lubricating Oil
slack top sides of the chain may come
into contact with each other; to prevent Driving Side (3)Not Good Lubrication Method ACB C
this, use an idler or something equivalent. (Change the rotating direction or Temperature (A) －10 0 40 50 －10 0 40 50
use an idler) Chain No. 0 ～ 40 ～ 50 ～ 60 ～ 0 ～ 40 ～ 50 ～ 60 ～
Vertical Arrangement 25～50/06B～10B SAE10 SAE20 SAE30 SAE40 SAE10 SAE20 SAE30 SAE40
In (5) shown, an elongated chain may sag below the bottom sprockets. In this case, 60～80/12B～20B SAE20 SAE30 SAE40 SAE50
when a small sprocket is arranged below a large sprocket, the elongated chain may
drop away from the small sprocket. To prevent this, the shafts should be arranged as in
(4) , maintaining the angle at a maximum of 60°. When the mechanism in question or The lubrication methods(mentioned in the power transmission efficiency tables are based on the followings.)
the installation space requires a vertical arrangement, place the small sprocket above Lubrication Method Service Interval and Oiling Quantity Notes
the large sprocket and use an idler, etc. on the outside or inside as shown in (6) . Hand Oiling Apply oil by While slowly turning
Vertical Arrangement hand using a the chain, apply oil
evenly 3~4 times onto
hand oiler or a
Driving Side brush, normally the entire length of
at least once the chain. Be careful
everyday. not to allow hands or
clothing to be caught
between the chain and
the sprocket. When the
mechanism is run for
Idlers the first time after oiling,
60°
A be careful to excess oil
splashing over.
(4)Good (5)Not Good (6)Good
Drop Lubrication Oil the chain It is
in a manner recommended
(B) Deflection such that that a simple
casing be
approximately
The deflection should normally be maintained at 5~20 drops of installed over
the chain to
approximately 4% of the distance between the shafts, oil are applied prevent oil from
onto the chain
and approximately 2% in the following instances. per minute. splashing over.
a. The shafts are arranged almost vertical transmission.
b. The distance between the shafts is 1 m or more. Oil Bath Lubrication Dip the bottom Use a leak-free
of the chain
oil container.
c. The chain needs to be started and stopped frequently under heavy load. approximately Before
d. The chain needs to be run in the reverse direction. 10 mm below installing the
the oiled oil container,
surface. wash it
carefully
L×4% to remove
B dust, dirt and
other foreign
Rotating Plate The chain is oiled particles.
L Lubrication by a rotating plate. Maintain the
Dip the plate correct oil level.
approximately 20mm Do not overfill
(C)Load Fluctuation below the oil level. the container.
The wind velocity of
When the load varies during operation, install an initial the plate should be
tension either on the load or loose side of the chain. This 200 m/min or faster.
can remove vibration and reduce the noise of the chain.
Forced Circulation It is necessary Use a leak-free
Lubrication by Pump to adjust the oil container.
Tensioner(Ex.) Oil Pump oil quantity Before installing
Tensioner appropriately the oil container,
C to prevent wash it carefully
overheating. to remove
dust, dirt and
other foreign
particles.
Tensioner
Leaf Spring
Rubber
Tensioner(Ex. 1) Tensioner(Ex. 2)
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