"Machined" vs. "Cast" risers
SD Tikkun
Basic question folks, but I know very little about bow production techniques.
What are the fundamental differences, advantages, of each riser? For,
instance, I believe the machined aluminum is lighter, but Is one inherently
more durable? Etc.
I am considering Hoyt's Elan; its pricey, so any feedback would be appreciated.
Thanks in advance,
SD
Han S Kim
: Basic question folks, but I know very little about bow production techniques.
: Thanks in advance,
: SD
Aluminum is acuatlly heavier than Magneisum risers (that's why there is
no solid Aluminum riser) Cast means like a die cast, it's hot magensium
melted and molded from a die.
Machined means the Aluminum is put through "machine" that cuts holes in
the riser, and that's all engineering design.
As for the Elan, GO FOR IT. It's pricey yes, but if you like it than
you'll like it. If you want to get a GM, also a fantastic bow, go for that
too since it's almost a 1/3 of the price lately.
The bow is a bow, but you should also consider the limbs. I personally
think picking a good set of limbs is more important than picking a good
riser.
Machined risers are a newer technology, and I've heard some gripes here
and there about them but really most people at the top level shoot with
Machined Risers (Recurve shooters that is).
-----
Han Su James Kim SUNY Stony Brook
hk...@ic.sunysb.edu (917) 989 - 8227 *Pager*
http://www.sinc.sunysb.edu/Stu/hkim/ ICQ # 6243265
-----
GKyzerPPL
and machined to the desired shape......very strong...very durable...and more
expensive....machined risers will be with you for a long time.....
George Kyzer
Pre-Paid Legal Services
Offering Legal Protection with over 2700 Top Rated
Law Firms across the Country.
Alex Rodriguez
gkyz...@aol.comNOSPAM says...
>
>Cast risers can break.....Machined risers are made from a solid aluminum bar
>and machined to the desired shape......very strong...very durable...and more
>expensive....machined risers will be with you for a long time.....
Machined risers break too. Both cast and machined risers when properly
designed can be very stron and very durable. About the only generalization
that you can make is that machined risers are gernally heavier than cast
risers.
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Alex __O
_-\<,_
(_)/ (_)
Bob Davis
>Machined risers break too. Both cast and machined risers when properly
>designed can be very stron and very durable. About the only generalization
>that you can make is that machined risers are gernally heavier than cast
>risers.
Wouldn't that be because cast has tiny but numerous air pockets due to the
pouring process? Where as machined is solid material. Both take up the
same area but the weight and strength of the machined would be stronger.
R. Andy Baker
>In article <19981204123510...@ng113.aol.com>,
>gkyz...@aol.comNOSPAM says...
>>
>>Cast risers can break.....Machined risers are made from a solid aluminum bar
>>and machined to the desired shape......very strong...very durable...and more
>>expensive....machined risers will be with you for a long time.....
>Machined risers break too. Both cast and machined risers when properly
>designed can be very stron and very durable. About the only generalization
>that you can make is that machined risers are gernally heavier than cast
>risers.
Given that you have two risers that are exactly the same size, shape, and
material, but one is cast and the other machined, the only generalization that
*I* would make is that the machined riser will be stronger than the cast
one.
When a part is machined, it starts out as a block of metal and it is cut
away at until all that is left is the finished part. This yields very
high quality parts, but is expensive because of the waste (all of the
metal that gets cut off of the original block), the time it takes to do
the machining, and the fact that today most machining operations are done
by *very* expensive computer controlled machines.
Now, when a part is cast, they melt down a bunch of metal and pour it into
a mold. Then the part is removed from the mold and machined where needed
(mounting holes or surfaces, threaded holes, or anything that needs a high
tolerance). This is much cheaper because there is very little waste, and
it takes very little time to create the part. The down side is that you
will get anomalies within the metal of the cast part. These may be air
bubbles, or areas where the molten metal cooled too quickly (creating a
brittle area). These anomalies will weaken the part in that area. I'm
not saying that every part will be bad. Some casting processes are better
than others, but none are perfect.
The bottom line is that while the machined part is stronger, the cast one
very well may be more than strong enough. The best way to find that out
is to look at the track record for the part in question. Find out from
your local range, shop, or newsgroup if a particular riser stands the test
of time. If it's a new model find out if the maker has made cast risers
in the past that they trust.
_________________________________
R. Andy Baker "Any intelligent fool can make things
sher...@holly.ColoState.edu bigger, more complex, and more violent.
Senior in Mechanical Engineering, It takes a touch of genius -- and a lot
Colorado State University of courage -- to move in the opposite
direction." -Einstein
Jake Whitehorse
R. Andy Baker <sher...@holly.ColoState.EDU> wrote in message
news:749jvq$fs...@holly.ColoState.EDU...
james ashfield
strength greatly. Most companies dont bother 'cos it costs more and the price of
CNC machined stuff has decreased. Go for a decent machined riser, IMHO.
John Cryar
high-tech compound bows. As far as recurves go, I don't think it makes much
difference. jwc...@primenet.com
SD Tikkun wrote in message <19981204063119...@ngol06.aol.com>...
Alex Rodriguez
says...
A riser cannot be both cast and forged. It's either one or the other.
A forged riser is prefable to one that cast.
Akibaben
wrote a good piece explaining the differences between cast/machined/forged
risers.
I would suggest you email George or US ARche to get a copy.
I believ it was US Archer and not Focus since the article was about a ur or 1
1/2 yrs ago before Focus was out.
Jeff
C. Bowes
their May/June issue of this year. Funny how time flies, right Jeff?
In article <19981206071036...@ng-fc1.aol.com>,
akib...@aol.com says...
--
C. Bowes bo...@tamu.edu *Please check my address before you reply.
Mech. Engineering
Texas A&M University
Akibaben
to read it not just Techi's like us.
Jeff Glasberg
MannyTanto
>wrote a good piece explaining the differences between cast/machined/forged
>risers.
>I would suggest you email George or US ARche to get a copy.
>I believ it was US Archer and not Focus since the article was about a ur or 1
>1/2 yrs ago before Focus was out.
>Jeff
So who is George T and what's his e-mail address
C. Bowes
archer in his spare time. I don't know him personally, but a few people
on our archery team do. Sorry don't know his email either.
In article <19981208005906...@ng110.aol.com>,
manny...@aol.comnospam says..
>
> So who is George T and what's his e-mail address
>
--
SD Tikkun
To all those who addressed this question, both publicly and privately, thank
you very much... I really appreciated all the feedback. Clearly, theres a lot
of experience and talent lurking out there!
SD