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#1
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
My new Buck Algonquin bronze shaft log is advertised as being bored to
accept a 1.5" cutlass bearing. My new Duramax cutlass bearing is advertised as having an outside diameter od 1.5" (to accommodate a 1" prop shaft). I tried to slide the Bearing into the Log - no way. I got out the calipers; the O.D. of the bearing is indeed 1.50", but the I.D. of the Log is just 1.4875" Is it expected that one must heat / cool these pieces in order to get them to fit? Or, did Buck Algonquin use the wrong "drill bit"? If heating / cooling is expected, is it a hair dryer or a blow torch... Many Thanks. MW |
#2
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
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#3
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
Mike,
Call someone. Shaft log fittings and struts for bronze carrier cutlass bearing only come two ways: 1 - light press fit 2 - fastener retained. ..0125 Ain't NO Light Press and if you can't get the bearing in at all then don't bother look for where the screws that hold the bearing go. Two Possiblities: 1 - the log casting missed the final reaming step. Fortunately, this can be done by hand in place, but the reamer is and expensive tool. 2 - the casting was made for one of the new all rubber cutlass bearings. I think you better call someone at Algonquin. Matt Colie wrote: My new Buck Algonquin bronze shaft log is advertised as being bored to accept a 1.5" cutlass bearing. My new Duramax cutlass bearing is advertised as having an outside diameter od 1.5" (to accommodate a 1" prop shaft). I tried to slide the Bearing into the Log - no way. I got out the calipers; the O.D. of the bearing is indeed 1.50", but the I.D. of the Log is just 1.4875" Is it expected that one must heat / cool these pieces in order to get them to fit? Or, did Buck Algonquin use the wrong "drill bit"? If heating / cooling is expected, is it a hair dryer or a blow torch... Many Thanks. MW |
#4
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
Don't heat the log, chill the cutless bearing. Pack it in dry ice, or a
dry ice/alcohol slush for a half hour or so and you'll find it slides right in. It will expand, holding it in place as it was designed to do. |
#5
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
On 16 Jan 2007 04:18:40 -0800, "Keith"
wrote: Don't heat the log, chill the cutless bearing. Pack it in dry ice, or a dry ice/alcohol slush for a half hour or so and you'll find it slides right in. It will expand, holding it in place as it was designed to do. Supposing I worked the numbers correctly - that you would need to heat the outer part by 500 degC plus - it is always possible to produce the required difference the other way - by freezing the inner part. Oh wait, there is no temperature in the universe that is 500 degC cooler than ambient. Maybe not then. Brian Whatcott Altus OK |
#6
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
Mike,
I had the yard mechanic remove the old and install the new cutlass bearing on my GS 41 for $40 4 years ago. I'm sure it's gone up some by now. He used a special puller/press and it took minutes to do. MMC wrote in message ps.com... My new Buck Algonquin bronze shaft log is advertised as being bored to accept a 1.5" cutlass bearing. My new Duramax cutlass bearing is advertised as having an outside diameter od 1.5" (to accommodate a 1" prop shaft). I tried to slide the Bearing into the Log - no way. I got out the calipers; the O.D. of the bearing is indeed 1.50", but the I.D. of the Log is just 1.4875" Is it expected that one must heat / cool these pieces in order to get them to fit? Or, did Buck Algonquin use the wrong "drill bit"? If heating / cooling is expected, is it a hair dryer or a blow torch... Many Thanks. MW |
#7
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
I had the vendor call Buck Algonquin, They replied that the bore on
the log shoud measure .001 smaller than the bearing, i.e. 1.499". Since mine measures 1.488, they decided to send me a replacement. Yipee! Thanks for all your replies. MW |
#8
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
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#9
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
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#10
posted to rec.boats.building
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Shaft Log / Cutlass Bearing - tight fit...?
On 15 Jan, 21:38, wrote:
My new Buck Algonquin bronze shaft log is advertised as being bored to accept a 1.5" cutlass bearing. My new Duramax cutlass bearing is advertised as having an outside diameter od 1.5" (to accommodate a 1" prop shaft). I tried to slide the Bearing into the Log - no way. I got out the calipers; the O.D. of the bearing is indeed 1.50", but the I.D. of the Log is just 1.4875" Is it expected that one must heat / cool these pieces in order to get them to fit? Or, did Buck Algonquin use the wrong "drill bit"? If heating / cooling is expected, is it a hair dryer or a blow torch... Many Thanks. MW Why not buy a composite bearing machined to 0.5-0.15mm less than carrier ID, slides in and should rotate easily, (this is a good way to check for shaft alignment) then simply bed with epoxy. When you come to change the bearing, simply heat the bearing carrier and it will slide out like its on grease. No corrossion no pullers . I have heard warnings that using dry ice to cool cutlass bearings will seperate the bond between the rubber and the phenolic or bronze, but I havn't tried this one myself. |
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