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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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I'm thinking of running three timing belts side by side on one pair of
pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) ..200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in ..200 pitch when I started this design. Now, no can find. Karl |
#2
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Karl Townsend wrote:
I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Karl What shape is the pulley? Any crowning will make the belts try to climb each other. OR make SURE that you need the inch pitch belts. Gates shows a 5mm pitch belt 25mm wide in the 9293 series HTD belts that would likely work IF the pulleys are metric pitch. http://www.gatespowerpro.com/Comerge...tNavigateFrame industrial power Transmission, then Synchronous belts, then Power grip HTD belts, the 5mm pitch -- Steve W. |
#3
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On Sat, 18 Jul 2009 17:00:49 -0500, "Karl Townsend"
wrote: .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Breco lists 1" wide .200 pitch (XL) urethane belts. Motion Industries shows various 1" wide XL belts in stock. What's the length? -- Ned Simmons |
#4
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McMaster carr has 1/2" wide xl belts so you would only have to run two of
them instead of three :-). They have the L series (3/8" pitch) in 1' width if you can go to the bigger series. ----- Regards, Carl Ijames "Karl Townsend" wrote in message anews.com... I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Karl |
#5
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![]() "Ned Simmons" wrote in message ... On Sat, 18 Jul 2009 17:00:49 -0500, "Karl Townsend" wrote: .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Breco lists 1" wide .200 pitch (XL) urethane belts. Motion Industries shows various 1" wide XL belts in stock. What's the length? -- Ned Simmons Thanks for the leads. I thought I'd seen them. I just ordered the timing pulley stock from stock drive products. I could have swore they had the belt also. I need one about 18" and another about 20". I'll double check length when everything is assembled before order. Karl |
#6
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On Jul 18, 5:00*pm, "Karl Townsend"
wrote: I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Karl My Cincinatti machining centers use three belts on the pulleys, to connect the Spindle motor to the Spindles. They run at 10,000 RPM and 15 horsepower or so. Only has pulley flanges on the outside. Offhand it seems to work fairly well. |
#7
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![]() "Ned Simmons" wrote in message ... On Sat, 18 Jul 2009 17:00:49 -0500, "Karl Townsend" wrote: .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Breco lists 1" wide .200 pitch (XL) urethane belts. Motion Industries shows various 1" wide XL belts in stock. What's the length? OK, help me out. I just burrowed down in motion industries and can't find 1" wide .200 belts. I kept selecting product category as far as possible, then it popped up a parametric search. I entered .200 and got only selections for 1/4, 3/8, and 1/2 top width. Karl |
#8
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On Sat, 18 Jul 2009 19:33:29 -0500, "Karl Townsend"
wrote: "Ned Simmons" wrote in message .. . On Sat, 18 Jul 2009 17:00:49 -0500, "Karl Townsend" wrote: .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Breco lists 1" wide .200 pitch (XL) urethane belts. Motion Industries shows various 1" wide XL belts in stock. What's the length? OK, help me out. I just burrowed down in motion industries and can't find 1" wide .200 belts. I kept selecting product category as far as possible, then it popped up a parametric search. I entered .200 and got only selections for 1/4, 3/8, and 1/2 top width. Are you signed up for MotionMRO? If you have an account, it gives you access to MI's inventory, pricing and cross referencing database. Speed Control 180XL100 TIMING BELT Item No. 00673536 Branch: 0 Whse: 0 Corp: 3 $6.88 Jason 200XL100 TIMING BELT Item No. 02307250 Branch: 0 Whse: 0 Corp: 0 Price On Request -- Ned Simmons |
#9
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![]() Are you signed up for MotionMRO? If you have an account, it gives you access to MI's inventory, pricing and cross referencing database. Speed Control 180XL100 TIMING BELT Item No. 00673536 Branch: 0 Whse: 0 Corp: 3 $6.88 No ,not signed up. WHAT A GREAT PRICE! Looks like I'd better sign on. Karl |
#10
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![]() My Cincinatti machining centers use three belts on the pulleys, to connect the Spindle motor to the Spindles. They run at 10,000 RPM and 15 horsepower or so. Only has pulley flanges on the outside. Offhand it seems to work fairly well. Thanks, i thought I'd seen this done. But it looks like Ned fixed me up. Karl |
#11
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![]() "Karl Townsend" wrote in message anews.com... I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Karl I like the way you think, always did! But, even I wouldn't do that. |
#12
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Karl Townsend wrote:
I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Don't know for sure, but I'd vote cluster****. |
#13
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On Jul 19, 8:00*am, "Karl Townsend"
wrote: I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. Karl Karl - not being all that experienced in these things, but was watching "Scrapyard Challenge" recently and they had a similar problem with multiple belts climbing over each other. The solution was meticulous alignment of the 2 shafts so they were exactly parallel to each other. And these belts were getting a real hiding..... Andrew VK3BFA. |
#14
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On Sat, 18 Jul 2009 23:13:26 -0400, the infamous "Buerste"
scrawled the following: "Karl Townsend" wrote in message tanews.com... I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) Yes, as soon as one belt got a bit of slack in it, it would flip sideways and try to ride the others. That would do one of two things: snap the loose belt or cause the adjuster to slip. That's why triple-belted compressors have v-belts and triple pulleys, for some separation. Watch a large compressor belt setup and you'll see them flap at each other. .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. I like the way you think, always did! But, even I wouldn't do that. You just liked the part about the belts jumping each other, didn't you, Tawm? -- Mistrust the man who finds everything good, the man who finds everything evil, and still more the man who is indifferent to everything. -- Johann K. Lavater |
#15
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![]() "Larry Jaques" wrote in message ... On Sat, 18 Jul 2009 23:13:26 -0400, the infamous "Buerste" scrawled the following: "Karl Townsend" wrote in message ctanews.com... I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) Yes, as soon as one belt got a bit of slack in it, it would flip sideways and try to ride the others. That would do one of two things: snap the loose belt or cause the adjuster to slip. That's why triple-belted compressors have v-belts and triple pulleys, for some separation. Watch a large compressor belt setup and you'll see them flap at each other. .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. I like the way you think, always did! But, even I wouldn't do that. You just liked the part about the belts jumping each other, didn't you, Tawm? I like the political implications, one on the left, one on the right and one in the middle. Which one wins? |
#16
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Buerste wrote:
"Larry Jaques" wrote in message ... On Sat, 18 Jul 2009 23:13:26 -0400, the infamous "Buerste" scrawled the following: "Karl Townsend" wrote in message anews.com... I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) Yes, as soon as one belt got a bit of slack in it, it would flip sideways and try to ride the others. That would do one of two things: snap the loose belt or cause the adjuster to slip. That's why triple-belted compressors have v-belts and triple pulleys, for some separation. Watch a large compressor belt setup and you'll see them flap at each other. .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. I like the way you think, always did! But, even I wouldn't do that. You just liked the part about the belts jumping each other, didn't you, Tawm? I like the political implications, one on the left, one on the right and one in the middle. Which one wins? Well the one on the right was on the bottom, And the one in the middle was on the top, And the one on the left got a broken arm, And the one in the rear said, "OH Dear" -- Steve W. |
#17
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![]() I like the political implications, one on the left, one on the right and one in the middle. Which one wins? The right and left seem to take turns winning. but the middle always gets run over. Karl |
#18
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![]() Buerste wrote: "Larry Jaques" wrote in message ... On Sat, 18 Jul 2009 23:13:26 -0400, the infamous "Buerste" scrawled the following: "Karl Townsend" wrote in message ctanews.com... I'm thinking of running three timing belts side by side on one pair of pulleys. Do you think I can get away with just bumpers on the outside edge of the pulley and three belts running beside each other? Or will they end up climbing on top of each other? In other words do I need belt guide bumpers for each belt? (hard to do in the space available - only room for two belts then) Yes, as soon as one belt got a bit of slack in it, it would flip sideways and try to ride the others. That would do one of two things: snap the loose belt or cause the adjuster to slip. That's why triple-belted compressors have v-belts and triple pulleys, for some separation. Watch a large compressor belt setup and you'll see them flap at each other. .200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in .200 pitch when I started this design. Now, no can find. I like the way you think, always did! But, even I wouldn't do that. You just liked the part about the belts jumping each other, didn't you, Tawm? I like the political implications, one on the left, one on the right and one in the middle. Which one wins? According to the late Johnny Cash: "The One On The Right Is On The Left" There once was a musical troupe A pickin' singin' folk group They sang the mountain ballads And the folk songs of our land They were long on musical ability Folks thought they would go far But political incompatibility led to their downfall Well, the one on the right was on the left And the one in the middle was on the right And the one on the left was in the middle And the guy in the rear was a Methodist This musical aggregation toured the entire nation Singing the traditional ballads And the folk songs of our land They performed with great virtuosity And soon they were the rage But political animosity prevailed upon the stage Well, the one on the right was on the left And the one in the middle was on the right And the one on the left was in the middle And the guy in the rear burned his driver's license Well the curtain had ascended A hush fell on the crowd As thousands there were gathered to hear The folk songs of our land But they took their politics seriously And that night at the concert hall As the audience watched deliriously They had a free-for-all Well, the one on the right was on the bottom And the one in the middle was on the top And the one on the left got a broken arm And the guy in the rear, said, "Oh dear" Now this should be a lesson if you plan to start a folk group Don't go mixin' politics with the folk songs of our land Just work on harmony and diction Play your banjo well And if you have political convictions keep them to yourself Now, the one on the left works in a bank And the one in the middle drives a truck The one on the right's an all-night deejay And the guy in the rear.. got drafted There are a couple links on YouTube for the song: http://www.youtube.com/watch?v=rhXiee1Q88A http://www.youtube.com/watch?v=aDSN1F72QU4 -- You can't have a sense of humor, if you have no sense! |
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