Shop built band saw project - Router Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 33 (permalink) Old 04-02-2012, 01:51 AM Thread Starter
Registered User
 
Join Date: Feb 2012
Country: United States
First Name: Chris
Posts: 1,298
 
Default Shop built band saw project

So I have decided to bite off more than I can chew, and am going to try to build a band saw.

My current plan is to build a small band saw using an electric motor I got on ebay and some scrap wood I have lying around. The plan is to make the wheels out of 2x8 pine. So the wheels will be about 7" diameter.

Eventually, maybe I'll make 14" wheels and a bigger saw, but I think I better start small.

For the wheels, I will use some skate board bearings. they are 7/8" outer diameter with a 5/16" inner.



That is all I have right now ... thanks for looking!
Chris Curl is offline  
Sponsored Links
Advertisement
 
post #2 of 33 (permalink) Old 04-04-2012, 03:29 PM Thread Starter
Registered User
 
Join Date: Feb 2012
Country: United States
First Name: Chris
Posts: 1,298
 
Default

QUESTION - how fast does the blade in a band saw move?

I'm trying to determine the pulley ratio for the motor and the wheels, so if someone could look at their BS and let me know what RPM the motor runs and the sizes of the pulleys connected to the motor and the drive wheel, that would be great.

I looked at a RYOBI 9" BS at Home Depot, and it looked like the motor ran at 3000 PRM and the pulleys between the motor and drive wheel were pretty close in size, both about 2-3 inches in diameter. If anything, the motor pulley might be a little smaller than the drive wheel pulley.

I wonder if a 14" BS And a 9" BS both move the blade at roughly the same speed ... ?
Chris Curl is offline  
post #3 of 33 (permalink) Old 04-04-2012, 06:45 PM
Registered User
 
The Warthog's Avatar
 
Join Date: Nov 2010
Country: Canada
First Name: Roger
Posts: 413
 
Default

You might want to consider a larger saw as being more forgiving. A 1/16" error on a 7" bandsaw is twice as bad as the same error on a 14" bandsaw. Besides, it won't be long before you begin to wish you had made a bigger saw.

According to my Band Saw Handbook, saws generally run at 2600 to 3100 feet per minute. Do your own math.

Cheers,
Roger


I'm not slow, I'm pacing myself!

Isaiah 44:13 Another shapes wood, he extends a measuring line, he outlines it with red chalk. He works it with planes and outlines it with a compass...

Usual kit: Table saw, band saw, dual base router and table, lathe, various saws, planer, sanders, and a multitude of hand tools.

Last edited by The Warthog; 04-04-2012 at 06:52 PM. Reason: Additional thinking
The Warthog is offline  
Sponsored Links
Advertisement
 
post #4 of 33 (permalink) Old 04-04-2012, 08:12 PM Thread Starter
Registered User
 
Join Date: Feb 2012
Country: United States
First Name: Chris
Posts: 1,298
 
Default

that is exactly the kind of number i needed, thanks!

i am thinking about a bigger saw, but the bigger it is, the stiffer the shell will have to be, which is my concern (being a newbie). that and the fact that the motor i have is only 1/2 hp, so it might not be up to some of the tasks.

but i doubt i'll be re-sawing really big stuff any time soon. famous last words, right?

Last edited by Chris Curl; 04-04-2012 at 10:06 PM. Reason: words, not works
Chris Curl is offline  
post #5 of 33 (permalink) Old 04-04-2012, 10:04 PM Thread Starter
Registered User
 
Join Date: Feb 2012
Country: United States
First Name: Chris
Posts: 1,298
 
Default

it turns out the bearings are a tad large for a 13/16" hole, and a tad small for a 7/8" hole

i guess i can do the 13/16 and the make it a tiny bit larger with a file or some sandpaper. then the bearings will be nice and tight.

i am going back to thinking i'd like to do a 14" instead ...

for the wheels, i'm thinking about taking some 1x5 and 1x6 pine and gluing them together at 90 degrees to make the wheels, sort of like they do plywood with the grain perpendicular on different layers.

or would i be better off gluing together 2 pieces of 3/4" plywood?
Chris Curl is offline  
post #6 of 33 (permalink) Old 04-05-2012, 01:45 AM
Registered User
 
Join Date: Feb 2012
Country: United Kingdom
First Name: roger
Posts: 129
 
Default

Chris just a thought here have you looked at the woodgears.ca website and checked out his building of a band saw
cedarwood is offline  
post #7 of 33 (permalink) Old 04-05-2012, 09:00 AM Thread Starter
Registered User
 
Join Date: Feb 2012
Country: United States
First Name: Chris
Posts: 1,298
 
Default

yes i have. even though i'm 51 years old, i want to be that guy when i grow up!
Chris Curl is offline  
post #8 of 33 (permalink) Old 04-05-2012, 06:41 PM Thread Starter
Registered User
 
Join Date: Feb 2012
Country: United States
First Name: Chris
Posts: 1,298
 
Default

i picked up a piece of 2'x2' 3/4" BC ply today - $7.63

i should be able to make 4 circles that will, after making sure they are perfectly round, be a little under 12" diameter.

so i am working towards having an 11 3/4" band saw i guess ...

i am going to start extremely simple with the support structure for it and refine it as needed until it is stiff enough for my needs. i won't be re-sawing thick stuff any time soon.
Chris Curl is offline  
post #9 of 33 (permalink) Old 04-05-2012, 08:00 PM
Official Greeter
 
jw2170's Avatar
 
Join Date: Jan 2008
Country: Australia
First Name: James
Posts: 18,230
 
Send a message via Skype™ to jw2170
Default

I will be interested in watching your project as you progress.

To be candid, though, I cannot see the point in building a "T model Ford" (with the risk involved) when there are many "small sedans" available on Craigs List....

If you are building it just to say "I did it" - I can relate to that also.

First, make sure what size you want to end up with. This is not something you can change in mid-stream.

James
Sydney, Australia
.

I don't mind if other members disagree with my comments.
I don't profess to know everything, and I may learn something new.

"Never attribute to malice that which is adequately explained by stupidity."




jw2170 is offline  
post #10 of 33 (permalink) Old 04-05-2012, 09:40 PM Thread Starter
Registered User
 
Join Date: Feb 2012
Country: United States
First Name: Chris
Posts: 1,298
 
Default

it is about 30% "i made it myself", about 70% "i'm a frugal SOB and money is REALLY tight right now", and 100% "i have more time than money"
Chris Curl is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Joke a Day bobj3 Lobby 3465 12-12-2019 09:12 AM
Plans for shop built dovetail jig. thecave Jigs and Fixtures 29 11-15-2012 01:57 PM
Shop built "miter" saw Chris Curl Project Plans and How To 11 03-24-2012 01:43 AM
Shop Organization Marco Tools and Woodworking 8 10-07-2011 07:57 AM
Shop built router lift? TanOak Table-mounted Routing 51 09-13-2010 03:17 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome