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View Full Version : Homemade simple blocks and sheaves. (pics)



bobkaschak
05-28-2003, 10:06 AM
Here are some sheaves I made from phenolic. I cut a couple of disks of phenolic, and cherry with a hole saw. I "sand-wiched" the phenolic between the cherry with a 1/4" dowel, and some double sided carpet tape. I custom ground a turning tool, mounted it on the lathe, and insted of the normal tool angle, these have to be "scraped" into shape. The phenolic is so hard, that when I tried to cut at a normal turning angle, the tool would "bite" into the wood too hard. The brass is 3/4" flat stock, and was cold worked in a vise. They seem to work fine.

http://www.imagestation.com/picture/sraid63/p454ce7eae858bf5b05cdb0a15b498625/fc0fea07.jpg

http://www.imagestation.com/picture/sraid63/pdf98eed69c862224ad6acd9884e7dfb9/fc0fe9c1.jpg

http://www.imagestation.com/picture/sraid63/p777a99fdb4adab093a41c8de51be8fa4/fc0fe99e.jpg

http://www.imagestation.com/picture/sraid63/p63585a2d8d3916628e9eee7795667c5b/fc0fe958.jpg

http://www.imagestation.com/picture/sraid63/p3b3e94c21dc8f51c0918e6ebf8a2a0c7/fc0e7806.jpg

http://www.imagestation.com/picture/sraid63/p75afdfabbf1cd2d5cacffbb0ee59ea46/fc0e77fe.jpg

http://www.imagestation.com/picture/sraid63/pb52f4bece6434ad6a5d2e856581b2370/fc0e77f7.jpg

Carl Simmons
05-28-2003, 10:21 AM
Very creative, nice photos too!

Carl.

jlapratt
05-28-2003, 10:52 AM
Disappointed in your work Bob. You have an odd screw in your rudder whose slots don't align perfectly with the others..tsk, tsk. :D

Everything looks great! I like the idea of making custom hardware for speciifc applications. Good job.

Jeff

TimothyB
05-28-2003, 11:24 AM
Have you though about using UHMW plastic for sheaves? I was thinking about getting a few cutting boards and trying it out. It is dense, tough and cheap. I like that in a sheave. smile.gif

For thicker sheaves I would bet you could get away with bolting together layers of UHMW. Brent Swain advocates this method for making cheap anchor rollers. If I can get an anchor roller for $10, I'm all for it!

The blocks/sheaves look great!

--T

Frank Wentzel
05-28-2003, 11:39 AM
Tim

UHMW polyethylene is very sensitive to UV light. If your parts will be shielded from sunlight, UHMW will be an ideal material for sheaves. It's lubricity and wear resistance are unparalleled.

/// Frank ///

Wild Dingo
05-28-2003, 11:41 AM
Jeff I too wondered what on earth Bob could have been thinking to allow a screw to be out of place and to show the world!! :( ... but to show that AND to show that blemish in the fittings of the 5th photo as well? :eek: egads!! :D tongue.gif :D Bob does seem to be slippin must be the fine weather eh? ;)

Sound idea there Bob... I love inventiveness and the power of making your own... these are some of the things that make forums such as this worthwhile... fellas and sheilas teachin and others takin that and learning :cool:

[ 05-28-2003, 11:42 AM: Message edited by: Wild Dingo ]

paladin
05-28-2003, 12:57 PM
...and you should also notice in the fifth phot that his snap shackel was inverted and not moused......

jlapratt
05-28-2003, 01:39 PM
Okay, okay, I started it, I apologize. Gotta give Bob a break here. We're only pickn' on ya Bob 'cause we're envious!! Seems that the harder I work on making my boat perfect, the farther away from perfect I seem to get.

Jeff

John Blazy
05-28-2003, 02:32 PM
Very ingenious. Thats gotta be the most indestructible non-metal sheave imaginable. Was the canvas reinforcement in the phenolic abrasive to your tool? Great coldworking of the brass. I plan on making a hand made, mirror polished stainless steel bow light for my boat, as well as cleats etc, but may just go with brass now.
Great job. Love the screws the way they are - they contrast the perfection of the main dish.
- JB

Carl Simmons
05-28-2003, 02:45 PM
I figured the screws were different metal on purpose. By using different metals (or plating) they will corrode at different rates thus providing time to replace them when the first lets loose :D

Actually, I didn't even notice. You should see mine, I have phillips mixed with square drive :eek: :eek: :eek:

Carl.

Art Read
05-28-2003, 03:31 PM
Very cool! :cool:

(...and I ain't EVER letting any of you "dock admirals" near my boat! :eek: )

[ 05-28-2003, 03:34 PM: Message edited by: Art Read ]

jlapratt
05-28-2003, 08:51 PM
"Dock Admirals????" :confused: :confused: :confused:

Touche!! :D

I figured the way around paying that much attention to detail.........plugs and googe!

Actually, I am looking to add some nice brass and polished bronze to my skiff, but have limited places to put it. What a nice finish it makes and character it adds to the bright work. Anyone know where to find pop-up cleats in brass or bronze?

Jeff

bobkaschak
05-29-2003, 10:18 AM
Hmmmmmmm. cutting boards. I think there are too many cutting boards in our kitchen. The only thing to worry about (other than UV damage) would be explaining to SWMBO why the remainder of a perfectly good cutting board is lying in the workshop looking like swiss cheese. ha ha. The cloth in the phenolic was probably the abrasive force in cutting. I don't know if it dulled the tool too much, as I only spun 3 of them. Here is a previously taken, and un-doctored photo showing the uniform usage of metal types in the fasteners. (must have been a reflection thing) I do admit that one of them is not aligned properly (normally unacceptable to a Virgo such as myself)(must have been too many Sam Adams that night) I shall fix that promptly. ha ha
You guys are great.
Thanks,
Bob

http://www.imagestation.com/picture/sraid63/p538ab5eb553bf3044192f503abecee48/fc0c646b.jpg

shadow99
05-30-2003, 03:40 PM
Bob the key to turning with phenolic material is two items:
1.) Use a carbide tool (the phenolic material is very abrasive on HSS tools.

2.) The tool MUST be dead sharp, also set it alittle below centerline, the more positive rake the better. When trying to plunge in with a large radius tool, such as you did. The material will "push-out" not peel like it should. Use a grooving tool or skew chisel to remove excess material before plunging in wit the large radius tool.

Cutting will be easier, and better looking as well!

Hope this helps :D !

Rick

brian.cunningham
05-31-2003, 10:02 PM
Very nice indeed.

Wooden Boat Fittings
06-01-2003, 09:13 AM
Good stuff Bob, they look great.

One of the several nice things about tufnol I think is that it looks so much like wood.

But listen guys, not brass, please, not unless it's below deck and protected. Always bronze for deck fittings.

Jeff, our member Jack Dillon's got a patented cleat design that might answer your needs.

Mike

[ 06-01-2003, 09:50 AM: Message edited by: Wooden Boat Fittings ]

vince gordon
06-02-2003, 08:16 AM
Bob the work looks excellent! any chance we can see a photo of your entire boat?

bobkaschak
06-02-2003, 08:50 AM
Vince, here you go. Thanks for all of the compliments.
Best regards,
Bob K.

http://www.imagestation.com/picture/sraid61/p0a272b5c813ebc737c9d84fe76248a3b/fc269d59.jpg

http://www.imagestation.com/picture/sraid61/pc2f9fd9c462737f9b0e8ba8b03f0a994/fc269d40.jpg

jlapratt
06-02-2003, 08:25 PM
Thanks Mike. Sent Jack an e-mail.

Jeff