Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


Filter this topic showing only the reply marked as answer View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 


935 posts

Ultimate Geek
+1 received by user: 479


  Reply # 2185983 23-Feb-2019 17:55
Send private message quote this post

The blade tips must be able to extend straight out as the blade rotates. If one is stuck folded that would easily explain the vibration.

9/16" is 14.3mm so a 14mm socket will be a snug fit. The bolt is 3/8 UNF not metric.

I usually jam the blade with a piece of wood.

 

I finally managed to remove the blade. The bolt was a left hand thread.

 

No, just kidding :-). Conventional RH thread.

 

The tips don't rotate very freely. I guess they rely on centrifugal force to keep them in line with the blade-holder, but they still seem pretty rigid to me.

 

Anyway, I CRC'd them and then added ordinary oil. They're held on by locknuts so they can't be over-lubed.

 

I didn't run the mower without the blade in case, as you pointed out, the weight is needed as a flywheel.

 

But I will return it to M10, I still think the vibration is excessive.


15358 posts

Uber Geek
+1 received by user: 2984
Inactive user


  Reply # 2186000 23-Feb-2019 18:31
Send private message quote this post

geekIT:

 

Bung: So we all have all the details.

What is the model of mower and what type of blade is it?

If it is a blade holder with swinging blade tips it is possible that one tip is stuck not fully extended, that will unbalance the mower. A fixed blade would need obvious damage to unbalance it after just 10 mins running.

The mower probably wouldn't run well without a blade as it could act as part of the flywheel.

If it is a Briggs & Stratton engine the bolt will be a normal 3/8 x 11/4" UNF not lh thread.

 

Okay, the machine is branded on the (red) shroud 'Vinaro 350ST'. There's a plastic plaque on the front labeled 'MORRISON'

 

The engine is a B&S 500E, 140 CC OHV. Made in USA.

 

I took a look at the blade, and yes, it has add-on tips.

 

You say 'swinging' blade tips - does that mean these bits should be rotating freely? Because they don't. One is pretty much locked in place, the other moves if I twist it.

 

Incidentally, the bolt head exactly fits a 14mm socket. I tried again to undo it as I would a conventional rh thread , but it wouldn't move. 

 

Shame these things don't have a locking button like most skilsaws.

 

I'll find a way tomorrow :-)

 

 

The tips move. Being tight is normal. if you had a fixed blade and you hot a solid object, bye bye crankshaft. The tips will fold back, centrifugal force will put that back into place. If you don't regularly mow bricks :-) they will get tight


 
 
 
 


870 posts

Ultimate Geek
+1 received by user: 529


  Reply # 2186262 24-Feb-2019 12:37
Send private message quote this post

Are the tips in good condition? If they are a dis-similar weight due to wear and/or damage that will cause vibration (that is one reason they need to be periodically replaced). Also, if someone has fitted the tips with different length bolts, numbers of washers or otherwise messed up the left to right weight balance, that will cause vibration. You can test-run the mower without the tips fitted to narrow the cause of the vibration down. 

 

If one tip gets stuck folded in, the imbalance shakes the mower quite violently - "excessive" would be a conservative description.


1 | 2 | 3 
Filter this topic showing only the reply marked as answer View this topic in a long page with up to 500 replies per page Create new topic


Donate via Givealittle


Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Amazon introduces new Kindle with adjustable front light
Posted 21-Mar-2019 20:14


A call from the companies providing internet access for the great majority of New Zealanders, to the companies with the greatest influence over social media content
Posted 19-Mar-2019 15:21


Two e-scooter companies selected for Wellington trial
Posted 15-Mar-2019 17:33


GeForce GTX 1660 available now
Posted 15-Mar-2019 08:47


Artificial Intelligence to double the rate of innovation in New Zealand by 2021
Posted 13-Mar-2019 14:47


LG demonstrates smart home concepts at LG InnoFest
Posted 13-Mar-2019 14:45


New Zealanders buying more expensive smartphones
Posted 11-Mar-2019 09:52


2degrees Offers Amazon Prime Video to Broadband Customers
Posted 8-Mar-2019 14:10


D-Link ANZ launches D-Fend AC2600 Wi-Fi Router Protected by McAfee
Posted 7-Mar-2019 11:09


Slingshot commissions celebrities to design new modems
Posted 5-Mar-2019 08:58


Symantec Annual Threat Report reveals more ambitious, destructive and stealthy attacks
Posted 28-Feb-2019 10:14


FUJIFILM launches high performing X-T30
Posted 28-Feb-2019 09:40


Netflix is killing content piracy says research
Posted 28-Feb-2019 09:33


Trend Micro finds shifting threats require kiwis to rethink security priorities
Posted 28-Feb-2019 09:27


Mainfreight uses Spark IoT Asset Tracking service
Posted 28-Feb-2019 09:25



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.