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Yan Type 3 Grip
Started by liftmech, Jan 14 2004 07:42 AM
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#1
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Posted 14 January 2004 - 07:42 AM
A while back Allan requested some photos of the Yan Type 3 grip. This was the replacement for the older Type D and T grips, and went into service around 1981.
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#2
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Posted 14 January 2004 - 07:44 AM
From the top. (S-lift, 1983)
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#3
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Posted 14 January 2004 - 07:45 AM
On line, bottom view. You can see the end of the bolt in the mobile jaw; this is how spring tension is adjusted. (R-lift, 1982)
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#4
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Posted 14 January 2004 - 07:55 AM
The TB-81 carrier. Yan didn't galvanise these; he did 'bright finish' instead. The surface of the steel is slightly rainbow-hued as a result.
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#5
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Posted 14 January 2004 - 08:03 AM
on the topic of grips...
how did the Riblet internal grip work and which do lift mechanics like better interal or external
how did the Riblet internal grip work and which do lift mechanics like better interal or external
#8
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Posted 14 January 2004 - 04:45 PM
Thanks! Those grips don't have the movable ramps, so they must be quiet.... Not like our noisy ones!! :)
The Riblet grip is inserted into the core of the haul rope. Both designs have their positive and negative aspects. Insert grips don't slip (well they better not!!) have fewer moving parts, and are very smooth on the line equipment. However, to relocated them you must detension the section haul rope, remove the grip, replace the chunk of core, retension the rope, cut out a piece of core slide the grip in and retension the rope. The clamp-type grips are easy to move, and remove. They usually provide a "rough" ride, and have more parts that can fail. I think I've covered most bases here, but I prefer the clamp type to the insert type.
The Riblet grip is inserted into the core of the haul rope. Both designs have their positive and negative aspects. Insert grips don't slip (well they better not!!) have fewer moving parts, and are very smooth on the line equipment. However, to relocated them you must detension the section haul rope, remove the grip, replace the chunk of core, retension the rope, cut out a piece of core slide the grip in and retension the rope. The clamp-type grips are easy to move, and remove. They usually provide a "rough" ride, and have more parts that can fail. I think I've covered most bases here, but I prefer the clamp type to the insert type.
- Allan
#9
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Posted 14 January 2004 - 06:34 PM
Thanks
One more thing
Was Riblet the only ones to use the internal system?
One more thing
Was Riblet the only ones to use the internal system?
#10
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Posted 14 January 2004 - 06:36 PM
Yes, they had a patent on it. Although it was a U.S. or North American patent, so a lift manufacturer over in Europe could be using the same thing if they wanted too. So there could be another manufacturer that did.
- Cameron
#11
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Posted 14 January 2004 - 09:05 PM
Other aspects of insert grips.
If setup properly for each type of grip relocation an insert grip still takes 3 times as long to move.
Due to the aspect of detensioning the haul rope twice for each grip relocation, insert grips are approximately 300 times as dangerous to relocate.
A broken finger on a Riblet grip is impossible to see with the grip in the haulrope.
Two broken fingers on a Riblet grip will cause a lift mechanic to wet his pants.
About half of all Riblet grips have a short usable life. See Riblets web site for retirement criteria.
Riblet grip failures prompted the stronger grip testing codes.
Riblet grips can be removed without detensioning, not an advertised feature.
When repairing a haul rope strand, many lift mechanics wished insert grips slipped.
If setup properly for each type of grip relocation an insert grip still takes 3 times as long to move.
Due to the aspect of detensioning the haul rope twice for each grip relocation, insert grips are approximately 300 times as dangerous to relocate.
A broken finger on a Riblet grip is impossible to see with the grip in the haulrope.
Two broken fingers on a Riblet grip will cause a lift mechanic to wet his pants.
About half of all Riblet grips have a short usable life. See Riblets web site for retirement criteria.
Riblet grip failures prompted the stronger grip testing codes.
Riblet grips can be removed without detensioning, not an advertised feature.
When repairing a haul rope strand, many lift mechanics wished insert grips slipped.
www.ropetech.org
#12
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Posted 15 January 2004 - 09:37 AM
...and that's why the Riblet detensioner is unofficially called the 'Riblet Finger Amputation Device'. 
Even while moving and storing the detensioner, it's still dangerous- I broke my thumb a while back while moving the thing into the shop. 
If you don't have it compressed while moving, it flops around and the jaws bite (pun intended).
I like the clip for its ease of inspection and maintenance, and external grips for their ease of relocation. Yes, the Type 3 grip is much queter than the older Type Ds and Ts.
Eric- I don't know of any Yan fixed grips that were unsafe. These have worked pretty well for the last 22-23 years, although they do wear out like anything else. The 400 series stainless used in the grips is a bit softer than ordinary steel, and tends to conform to the crowns and valleys of the haul rope.
I've seen that... I think that was the year we bought all new clips for that lift because 10 of 14 in the sample group were broken to some degree. The new clips don't have ears anymore. I wonder why?
Even while moving and storing the detensioner, it's still dangerous- I broke my thumb a while back while moving the thing into the shop. If you don't have it compressed while moving, it flops around and the jaws bite (pun intended).I like the clip for its ease of inspection and maintenance, and external grips for their ease of relocation. Yes, the Type 3 grip is much queter than the older Type Ds and Ts.
Eric- I don't know of any Yan fixed grips that were unsafe. These have worked pretty well for the last 22-23 years, although they do wear out like anything else. The 400 series stainless used in the grips is a bit softer than ordinary steel, and tends to conform to the crowns and valleys of the haul rope.
Quote
Two broken fingers on a Riblet grip will cause a lift mechanic to wet his pants.
I've seen that... I think that was the year we bought all new clips for that lift because 10 of 14 in the sample group were broken to some degree. The new clips don't have ears anymore. I wonder why?
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#16
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Posted 15 January 2004 - 05:31 PM
It's only Draw Hook type grips. YAN grips are not this type (Unless the Type 3's are different...) and generally don't slip. As SkiBachelor said - the CTEC grips slip 2 meters plus over the course of our season.
- Allan
#18
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Posted 17 January 2004 - 09:04 AM
It can be, but only if it's one or two grips that are slipping while the rest are moving less than a metre. The Type 3 grips pictured above move probably 20-30 cm per season on average, which isn't really very much. As long as all the grips are 'migrating' the same distance, it's all good. :)
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#20
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Posted 01 March 2005 - 10:08 AM
Does anyone have pictures of the Yan D and T grips? Also how would someone like me who has not worked on any lifts identify the differences between the two?
-Bryan
Theres a place for all of God's creatures, right next to the mashed potatoes.
"You could say that a mountain is alot like a woman, once you think you know every inch of her and you're about to dip your skis into some soft, deep powder...Bam, you've got two broken legs, cracked ribs and you pay your $20 just to let her punch your lift ticket all over again"
Theres a place for all of God's creatures, right next to the mashed potatoes.
"You could say that a mountain is alot like a woman, once you think you know every inch of her and you're about to dip your skis into some soft, deep powder...Bam, you've got two broken legs, cracked ribs and you pay your $20 just to let her punch your lift ticket all over again"
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