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Thread: cone centres
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24th September 2014, 09:43 PM #1SENIOR MEMBER
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cone centres
whats the difference between these 2 live centres?
The one on the left is Vicmarc cone centre HD and the other is a larger 60degree centre ( unknown brand)
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24th September 2014 09:43 PM # ADSGoogle Adsense Advertisement
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24th September 2014, 10:20 PM #2Retired
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The good one on the left is around $80 or thereabouts, the other one (probably made in China or Taiwan) is less than $50. The larger centre is useful after you have bored a grinder and want to turn between centres. I haven't worn my big ones out yet, you'd need to talk with Brendan as to how long they really last.
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24th September 2014, 10:21 PM #3
I suspect the Vicmarc would be a removeable cone so you can make different attachments for it while the other is WYSIWIG!
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24th September 2014, 10:35 PM #4SENIOR MEMBER
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24th September 2014, 10:37 PM #5SENIOR MEMBER
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24th September 2014, 10:55 PM #6
Originally I purchased the one on the right. Because that was the only one they had left.
Then after getting a new lathe I acquired one similar to the one on the left. I tend to use the original as that is the one that I started with.
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24th September 2014, 11:02 PM #7Retired
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24th September 2014, 11:16 PM #8SENIOR MEMBER
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I thought it would be for larger holes, and yes I meant tail stock end not a drive centre.
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25th September 2014, 01:56 AM #9Senior Member
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There are two main types of live centres. The bit that spins is mounted on the inside like the Vicmarc or on the outside like the other one.
I prefer the first type because theres less metal moving to catch things on.
Steve.
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25th September 2014, 02:24 AM #10
The Cones.
Hi All,
Wood not use either of those Dangerous to me Cones.
For the work I do, they wood split my wood every time, & most likely come out of my Lathe if I was working between centres.
I use a Ring & Cone No.2 MT, which has 2 bearings in them.
Far better still, if you have a Mate that can make them for you.
Cost, most likely a beer or two.Regards,
issatree.
Have Lathe, Wood Travel.
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25th September 2014, 05:04 AM #11Retired
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Lewis,
I unfortunately do not agree with you on this one. If you apply appropriate tailstock support with either live centre, you will not split the wood. In the usual course - box making for example - you might turn between a steb and live cone centres, putting tapered tenons either end for chucking. I don't know how you could split say Dead Finish or Mulga, even with too much tailstock pressure.
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25th September 2014, 06:53 AM #12
The design of live centers is a bit like un-sprung weight in vehicle design. The less weight moving about the better but again depends upon the application/s.
For heavy blanks/pieces both would be suitable. For light weight or thin spindle work the Vicmarc would be my #1 choice. I have a very small custom live center for my spindle work. The mass of the spinning section of the live center has to be "driven" to up to speed by the blank. If the blank is long & thin then it may actually torque the timber while trying to drive the extra mass. Also important to ensure live center bearings are in top condition for thin work.
It took me a little while to work out why some slender shafts on my spin tops would shatter for no apparent reason. No catches, but they would fly apart as they became thinner. After examining a few I noticed the shafts were twisted off rather than broken - hence the custom small live center.Mobyturns
In An Instant Your Life CanChange Forever
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25th September 2014, 07:51 PM #13
I have and use both. The big one is perfect for doing pepper grinders.
Neil____________________________________________Every day presents an opportunity to learn something new
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26th September 2014, 03:55 AM #14Member
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Why would a dedicated cone center be better than a live center with removable points?
I have the Nova live center (abt $70) and it is quick and easy to make different centers/points. I even use custom points in the head stock as friction drives for small items with the treaded insert.
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26th September 2014, 10:24 AM #15
Starting with the original question the difference between the 2 cones is the application.
Small cone small work large cone larger work
The main difference between the 2 is the quality
The Vicmarc has better quality bearings than the large cone
The large cone as everyone has eluded to is mainly used where a 25mm hole is used for alingment ie peppermills or other things like this.
THe 2 most popular live centres are the pin & ring style or the steb centres, the main reasons for this is that there is only a very small pin which stops splitting timber and also allows better centre alignment, then you have the ring part giving a better grip on the peice. This is especially noticable on timber with wide growth rings where the cone type will wander of the hard growth ring into the softer wood between the rings. With the pin and ring style because it allows you to only have a very short pin it will not wander of centre, where the larger cone with a wider angle will slip of centre easily.
The cone ring has it advantages on small work where you want to get in close to the end as most pin and ring centres have about 1/2" or more.
THe pin and ring has another advantage of re alingment when you have the ring to locate on as sometimes the cone drifts a bit and you finish up with the peice running of centre.Jim Carroll
One Good Turn Deserves Another. CWS, Vicmarc, Robert Sorby, Woodcut, Tormek, Woodfast
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