Isel MA Series Instruction Manual

Mecha-lock Instruction Manual
MA, MB, MKA, MSA Series
A mechanical lock is a friction fastener that fastens a
shaft and hub without the use of a key. The tolerances
and surface roughness of the shaft and hub installation
surfaces, and correct tightening of the lock bolts, are
very important factors in order to obtain the designated
performance.
If you have any questions, please contact a dealer or
our company.
For safe use of the product
Thank you for your purchase of an ISEL product.
In order to use the product safely and obtain the
designated full performance, please be sure to read the
following items.
◎Read this instruction manual carefully and understand
the contents before using the product, and be sure to
observe all instructions in the manual and use the
product correctly.
◎Be sure that you fully understand the information related
to the device and safety before using the product.
◎After reading, be sure to store this manual carefully so
that it can be referred to at any time when needed
during use.
This manual classifies important precautions into two
categories: DANGER and WARNING.

DANGER

Incorrect use or handling Incorrect use or handling
will produce dangerous will produce dangerous
conditions that may result conditions that may result
in death or serious injury. in injury.
There is also the risk of
property damage.
DANGER
◆When using this product, be sure that the necessary
mechanisms (covers, enclosures, etc.) for ensuring the
safety of life and health are installed on the equipment.
◆Wear clothing and protective gear that is suitable for the
work.
◆Keep the work area clean and orderly, and work safely
in order to prevent secondary accidents.
◆In the environment where the product operates, install
safety mechanisms onto all parts which may be a
danger to the operator.
◆When performing maintenance or inspections, turn OFF
the motor power (power supply) and check that the
machine has fully stopped before beginning work.
◆Before using lift equipment, install safety measures on
the equipment to prevent falling. There is the risk of
death or injury, as well as damage to the equipment, if
the lift part falls.
◆If the product is used for transporting persons, install the
necessary equipment for safety.
◆Do not touch the product while it is operating. Doing so
may result in injury, damage to the product, or other
damage.
◆Do not use the product for any purpose other than the
designated purpose, and do not modify the product.
There is the risk that the designated accuracy and
performance will not be possible.
◆If abnormal noise or vibration occurs during work,
immediately discontinue operation and inspect the
equipment and this product. If use is continued without
inspecting, there is the risk of injury to operators,
damage to equipment, and other damage.

WARNING

◇Check that the product is the one you ordered and that
there is no damage to it. If the product is not the one
you ordered or is damaged, there is the risk of injury to
operators, damage to equipment, and other damage.
◇Never use molybdenum oil or grease, or oil or grease
which contains an extreme-pressure additive. Doing so
may cause a large decrease in allowable torque,
resulting in slipping.
◇If the shaft includes a key groove, it can be used as
long as the groove width is as prescribed in the JIS
standard. However the maximum allowable torque is
reduced by 15% - 20%. Remove any burrs on the key
groove before using.
◇If the product is reused, check that there is no
deformation, damage, or other problem with the product
or any of its components before use. If there is damage,
deformation, or other problem, replace with a new
product.
◇When tightening lock bolts, be sure to use a torque
wrench that includes a torque adjustment scale, and
tighten at the designated tightening torque. Use of a
plate-type torque wrench may cause slipping,
deformation, and other trouble because it is difficult to
check the designated torque.
◇Never use any bolt other than the designated bolt. There
is the risk of damage to the bolt, resulting in an
accident.
◇In order to ensure the designated performance, an
opposite shaft with tolerance grade h7, hub tolerance
grade H7, and surface roughness of Ra1.6 or less is
recommended.
◇In the case of a hollow shaft (pipe), depending on the
thickness it may not be possible to obtain sufficient
surface pressure. Please contact our company.
◇If the product has special specifications, it may differ in
parts from the contents of this instruction manual.
Please contact a dealer or our company.
◇With stainless steel specifications (MSA Series), turn
the stainless steel bolts slowly when tightening them. If
WARNING
they are turned too quickly, galling or seizure of the bolts
may occur.
◇If the bolts are tightened when the mechanical lock is
not connected to anything, the mechanical lock may
become deformed and be rendered unusable. Therefore
check that the hub and shaft are fully inserted into the
mechanical lock when tightening the bolts.
● Structural drawings
Threaded holes
for part removal
● Installation
Use paint thinner or other means to wipe off any
( 1 )
corrosion, dirt, or other substance from the surface of
the shaft surface and inner diameter of the hub, then
apply a light coat of oil or grease.
Refer to Table 1 and apply a light coat of oil or grease to
( 2 )
the mechanical lock inner diameter parts, outer diameter
parts, contact parts of each taper, and the threads and
head seats of the lock bolts.
◇Using the product after unpackaging without applying oil
or grease to it may cause a decrease in allowable
torque.
Oil application
Grease application
*For details, refer to the selection design guide in the mechanical lock and coupling general catalog.
WARNING
◇Do not apply grease to the inner diameter parts of the
MSA Series. Doing so may cause slipping.
◇With the MSA Series, depending on the type of grease,
grease may improve the tightening efficiency. Because
this may result in shaft and hub surface pressure which
exceeds the yield point, it is recommended that
evaluation testing be performed.
Install the hub that was machined to the instructed
( 3 )
dimensions onto the shaft, and press the mechanical
lock onto the shaft. Check that the flange is in tight
contact with the end of the hub. (Figure 2) If the outer
race cannot be inserted, loosen the bolts and separate
3 1 2
( Figure 1 ) 1.Inner ring
2.Outer ring
3.Locking screw
MA MB MKA MSA
〇 〇 〇 ー
− − − 〇
( Table 1 )
the inner and outer race tapered parts to release the
tight contact before inserting. If the casing section
cannot be inserted, use a plastic mallet or similar tool to
gently strike it while inserting. (Strong striking is
prohibited!)
Torque wrench
Check for tight contact
with hub end: 0 clearance.
Flange
Hub
Shaft
( Figure 2 )
WARNING
◇If the flange and end are not in tight contact, there is the
risk that the mechanical lock flange may become
deformed.
◇If there is a step on the back of the hub, set clearance
of 1 mm or more between the back and step. (If this
clearance is not ensured, a large force will be required
for removal, and in some cases the inner race flange
may become deformed, making reuse impossible.)
(Figure 2)
( 4 ) After positioning, tighten the lock bolts. Use a torque
wrench and tighten the lock bolts at diagonally opposite
positions in sequence. Tighten gently at first
(approximately 1/4 of the designated torque) then
gradually increase the tightening force (approximately
1/2 of the designated torque), and then fully tighten the
bolts at the designated torque. Finally repeat tightening
of each bolt several times, working in the peripheral
direction. Check that all lock bolts have been tightened
at the designated torque and none were skipped.
(Figure 3) (Table 2)
Strength category 12.9 { A2-70 }
Bolt
M3
M4
M5
M6
M8
M10
M12
( Figure 3 )
{ } indicates the stainless steel specification MSA Series
● Removal
Check for safety before beginning removal work.
Turn OFF the motor power (power supply) and check
( 1 )
that there is no torque or thrust force applied to the
mechanical lock, and that there is no risk of falling or
other accident.
Gradually loosen each of the lock bolts in sequence.
( 2 )
Place the loosened lock bolts into all of the threaded
holes for part removal, then gradually screw in the bolts
working on opposite diagonals in sequence with even
force in order to disassemble. (Figure 4)
Threaded holes
for part removal
( Figure 4 )
1 mm or more
Tightening torque
N ・ ｍ
1.9
3.9 { 2.7 }
8.8 { 5.6 }
15.7 { 9.6 }
37.3
39.2 ( MB Series )
78.5
137.3
( Table 2 )