Q&A Clutch

We have posted frequently asked questions from customers in Q&A format. Please click on the question to proceed to the answer.

Words in Q&Aof

Cam clutches in general

Q1 I am planning to use a cam clutch with inner race, but would like to know how to install it if the shaft protrudes beyond inner race or if the shaft is shorter than inner race.
Q2 Does a Cam Clutch have backlash?
Q3 When meshing, is there a difference in the rotation angle between inner race and outer race?
Q4 What happens when a thrust load is applied to a Cam Clutch?
Q5 Do you manufacture stainless steel cam clutches?
Q6 When installing the BS series torque arm, clearance is required at the tip, but is this also necessary for types with built-in bearings such as the MZ series?
Q7 Can a Cam Clutch be mounted on a vertical shaft?
Q8 Is there anything I should be careful of when changing grease?

BS Series

Q9 I already have the BS series main unit and would like to add a safety cover later. Is this possible?
Q10 Is the BS reservoir painted?
Q11 Is the torque arm for BS painted?
Q12 What is the small diameter hole in the center of the BS torque arm?

MG Series

Q13 Does the MG-R series have an air hole in inner race?
Q14 Will the MG series slip if the oil tank is filled to the brim?

MZ Series

Q15 r/min is the maximum meshing rotation speed of the MZ series? Also, what problems will occur if the maximum rotation speed is exceeded?
Q16 What is the rotation direction for the MZ and MZ-G series?

PB Series

Q17 I am using the PB series, but what happens when the mounting shaft wears down and becomes thinner?
回答へ
Q1 I am planning to use a cam clutch with inner race, but would like to know how to install it if the shaft protrudes beyond inner race or if the shaft is shorter than inner race.
A1

"Shaft length > inner race width"...Please prepare a set collar for adjustment and fix it with the end plate.

"Shaft length < inner race width"...Fix with a stepped end plate.
However, please be careful with the key pressure, so please check in advance.

The standard shaft length varies depending on the series, so please contact us for details.

Back to Questions
Q2 Does a Cam Clutch have backlash?
A2

When torque is applied to a Cam Clutch in the direction of engagement, there is no backlash and it engages instantly.

Back to Questions
Q3 When meshing, is there a difference in the rotation angle between inner race and outer race?
A3

When torque is applied to a cam clutch, elastic deformation occurs in the cam, inner race, and outer race, resulting in a difference in the rotation angle between inner race and outer race.

This difference in rotation angle is called windup.

The windup increases in proportion to the load torque, and when the load on the Cam Clutch is removed, the windup returns to zero.

Back to Questions
Q4 What happens when a thrust load is applied to a Cam Clutch?
A4

The bearings that keep outer race concentric will wear out and heat up, shortening their lifespan.

There are also series without bearings, which can lead to internal damage.

Therefore, if a thrust load is applied to the Cam Clutch, please prepare a separate device to bear the thrust load.

Back to Questions
Q5 Do you manufacture stainless steel cam clutches?
A5 We do not manufacture such products. There is a method of rust prevention, but painting is required after installation on the device, so this should generally be done by the customer. Return to Questions
Q6 When installing the BS series torque arm, clearance is required at the tip, but is this also necessary for types with built-in bearings such as the MZ series?
A6 Even types with built-in bearings can become twisted, so be sure to provide clearance when using a torque arm. Return to Questions
Q7 Can a Cam Clutch be mounted on a vertical shaft?
A7

Cam clutches cannot be used on vertical shafts because grease and oil will be concentrated on the bottom side, resulting in poor lubrication.

Please contact us if you wish to mount the product on a vertical or inclined axis.

Back to Questions
Q8 Is there anything I should be careful of when changing grease?
A8

Please follow the amount of grease specified in the instruction manual.

If there is insufficient lubrication, the lubrication will deteriorate and the lubricant will reach a premature end of life. Conversely, if there is too much lubrication, it may hinder the movement of the cam and cause it to not mesh properly.

Use kerosene or similar to remove the old grease from inside before refilling with new grease.

Back to Questions
Q9 I already have the BS series main unit and would like to add a safety cover later. Is this possible?
A9 Yes, up to BS200. However, for BS220 and above, special parts are required, so please contact us separately. Return to Questions
Q10 Is the BS reservoir painted?
A10

To prevent rust on cast and welded parts, we apply a lacquer primer (red rust) undercoat.

Apply a finishing coat according to the usage environment.

Back to Questions
Q11 Is the torque arm for BS painted?
A11 It is not painted. Please paint it according to the environment in which it will be used. Return to Questions
Q12 What is the small diameter hole in the center of the BS torque arm?
A12 This hole is for draining rainwater that accumulates between the clutch and torque arm. Return to Questions
Q13 Does the MG-R series have an air hole in inner race?
A13 The MG series has one, but the MG-R oil reservoir has a pressure vent, so there is no air hole. Return to Questions
Q14 Will the MG series slip if the oil tank is filled to the brim?
A14

Even if you fill the tank up, there will be no slippage.

However, depending on the conditions of use, it may cause heat generation or oil leakage.

Back to Questions
Q15 r/min is the maximum meshing rotation speed of the MZ series? Also, what problems will occur if the maximum rotation speed is exceeded?
A15

The maximum rotational speed should be the same as the maximum idling rotational speed of outer race.

If the rotation speed increases any further, the grease at the contact point between inner race and cam will run out, causing problems such as abnormal heat generation and abnormal wear when the bearing is idling.

Back to Questions
Q16 What is the rotation direction for the MZ and MZ-G series?
A16 Please check the rotation direction of the actual product before installation. Return to Questions
Q17 I am using the PB series, but what happens when the mounting shaft wears down and becomes thinner?
A17

The cam clutch will lose its concentricity, and uneven load will be applied, causing the cam to rotate while being pressed down by the inner and outer outer race, which may result in the clutch generating heat and abnormal wear, resulting in a premature end of life.

Please avoid using it on a mounting shaft that is outside the recommended tolerances in the catalog.

Back to Questions