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techtalk:ref:tools147 [2021/07/08 07:20] hippysmack [Rocker Arm Bushing Reamer (94804-57)] |
techtalk:ref:tools147 [2024/01/24 21:50] (current) hippysmack |
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| **Reaming**: \\ | **Reaming**: \\ | ||
| - | Reaming is the process of cutting a larger hole to a specific diameter. ((oldmetal of the XLFORUM http://xlforum.net/forums/showthread.php?t=51086)) \\ | + | Reaming is the process of cutting a larger hole to a specific diameter. ((oldmetal of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/30701-replacing-cam-cover?t=51086)) \\ |
| The purpose is to not only make the hole the correct diameter but also to align it and square it with the part that goes into it. \\ | The purpose is to not only make the hole the correct diameter but also to align it and square it with the part that goes into it. \\ | ||
| This usually means aligning it with a hole, or bearing, opposite and at the other end of a shaft. \\ | This usually means aligning it with a hole, or bearing, opposite and at the other end of a shaft. \\ | ||
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| ====== Types of Reamers ====== | ====== Types of Reamers ====== | ||
| - | + | * Flute spirals. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/160109-changing-out-cam-bushings-help-on-a-couple-of-questions-appreciated/page3?t=1717904&page=3)) \\ All 3 reamers below are "right hand cut" meaning they all cut while being spun in the same direction as a drill bit. \\ Reamers come in different cuts as in straight, forward spiral, reverse spiral etc. Looking at the last one, you may think is cuts in reverse rotation but it does not. | |
| - | * Flute spirals. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717904&page=3)) \\ All 3 reamers here are "right hand cut" meaning they all cut while being spun in the same direction as a drill bit. \\ Reamers come in different cuts as in straight, forward spiral, reverse spiral etc. Looking at the last one, you may think is cuts in reverse rotation but it does not. | + | |
| * Straight reamers are by far the least expensive to buy. It also makes holes that aren't true cylinders. \\ They can have a lobed wall shape. This lobing goes hand in hand with amount of material being reamed away. \\ In our case it's a small amount of removal so the lobing is also very small. \\ For us it's ok for pinion & #2. But a spiral is nicer albeit usually 2X the cost. \\ It's also fine for 1-3-4 if bushes have no oil groove in bore. \\ Grooves in bore need the gap bridging action that spirals provide. \\ This is where you need spirals. | * Straight reamers are by far the least expensive to buy. It also makes holes that aren't true cylinders. \\ They can have a lobed wall shape. This lobing goes hand in hand with amount of material being reamed away. \\ In our case it's a small amount of removal so the lobing is also very small. \\ For us it's ok for pinion & #2. But a spiral is nicer albeit usually 2X the cost. \\ It's also fine for 1-3-4 if bushes have no oil groove in bore. \\ Grooves in bore need the gap bridging action that spirals provide. \\ This is where you need spirals. | ||
| * Forward Spiral reamers will give a truer (but not perfect) cylinder. \\ Forwards gives the lowest cutting forces = easiest to hand ream with. \\ But they can 'grab' into the work (like a drill sometimes does). | * Forward Spiral reamers will give a truer (but not perfect) cylinder. \\ Forwards gives the lowest cutting forces = easiest to hand ream with. \\ But they can 'grab' into the work (like a drill sometimes does). | ||
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| - Shell reamer. (fits on an arbor) | - Shell reamer. (fits on an arbor) | ||
| - | |1 thru 5 ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717904&page=3))|6. Shell Reamer ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717904&page=3))| | + | |1 thru 5 ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/160109-changing-out-cam-bushings-help-on-a-couple-of-questions-appreciated/page3?t=1717904&page=3))|6. Shell Reamer ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/160109-changing-out-cam-bushings-help-on-a-couple-of-questions-appreciated/page3?t=1717904&page=3))| |
| |{{:techtalk:ref:tools:reamers_1_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ref:tools:reamers_3_by_dr_dick.jpg?direct&300|}}| | |{{:techtalk:ref:tools:reamers_1_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ref:tools:reamers_3_by_dr_dick.jpg?direct&300|}}| | ||
| - | + | |A reamer cuts along its chamfer angle, \\ not on its outside diameter. ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/160109-changing-out-cam-bushings-help-on-a-couple-of-questions-appreciated/page3?t=1717904&page=3))|Bridge and Hand Reamers have a starting taper that \\ is too long for blind hole work. Each has a different \\ starting taper angle. ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/160109-changing-out-cam-bushings-help-on-a-couple-of-questions-appreciated/page3?t=1717904&page=3))| | |
| - | + | ||
| - | |A reamer cuts along its chamfer angle, \\ not on its outside diameter. ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717904))|Bridge and Hand Reamers have a starting taper that \\ is too long for blind hole work. Each has a different \\ starting taper angle. ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717904&page=3))| | + | |
| |{{:techtalk:ref:tools:reamers_4_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ref:tools:reamers_2_by_dr_dick.jpg?direct&300|}}| | |{{:techtalk:ref:tools:reamers_4_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ref:tools:reamers_2_by_dr_dick.jpg?direct&300|}}| | ||
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| \\ | \\ | ||
| - | This reamer sleeve was made for a 0.435" shank chucking reamer, by TPEHAK of the XLForum, from a 3D printer for use in reaming rocker arm bushings. ((http://xlforum.net/forums/showthread.php?t=2072192&page=7)) \\ | + | This reamer sleeve was made for a 0.435" shank chucking reamer, by TPEHAK of the XLForum, from a 3D printer for use in reaming rocker arm bushings. ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/195784-replacing-rocker-arm-bushings/page7?t=2072192&page=7)) \\ |
| You can see how it is used below. The centering sleeve is slid onto the reamer shank and the assembly goes into an existing bushing in the rocker arm. \\ | You can see how it is used below. The centering sleeve is slid onto the reamer shank and the assembly goes into an existing bushing in the rocker arm. \\ | ||
| - | Then the reamer was chucked in a hand drill run at low speed to ream the new bushing on the other end. ((photos by TPEHAK of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072192&page=11)) \\ | + | Then the reamer was chucked in a hand drill run at low speed to ream the new bushing on the other end. ((photos by TPEHAK of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/195784-replacing-rocker-arm-bushings/page11?t=2072192&page=11)) \\ |
| {{ :techtalk:ref:tools:cad_file_-_reamer_bushing_for_rocker_arm_by_tpehak.zip |Click Here to download the CAD file on the bushing}} \\ | {{ :techtalk:ref:tools:cad_file_-_reamer_bushing_for_rocker_arm_by_tpehak.zip |Click Here to download the CAD file on the bushing}} \\ | ||
| {{:techtalk:ref:tools:replacing_rocker_arm_bushing_pic8_by_tpehak.png?direct&250|}} {{:techtalk:ref:tools:replacing_rocker_arm_bushing_pic9_by_tpehak.jpg?direct&250|}} \\ | {{:techtalk:ref:tools:replacing_rocker_arm_bushing_pic8_by_tpehak.png?direct&250|}} {{:techtalk:ref:tools:replacing_rocker_arm_bushing_pic9_by_tpehak.jpg?direct&250|}} \\ | ||
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| {{techtalk:ref:tools:cam_bushing_installer_43_by_hippysmack.jpg?direct&300|}} | {{techtalk:ref:tools:cam_bushing_installer_43_by_hippysmack.jpg?direct&300|}} | ||
| {{techtalk:ref:tools:cam_bushing_installer_44_by_hippysmack.jpg?direct&300|}} {{techtalk:ref:tools:cam_bushing_installer_51_by_hippysmack.jpg?direct&300|}} \\ | {{techtalk:ref:tools:cam_bushing_installer_44_by_hippysmack.jpg?direct&300|}} {{techtalk:ref:tools:cam_bushing_installer_51_by_hippysmack.jpg?direct&300|}} \\ | ||
| + | |||
| ===== Cam Bushing Reamers ===== | ===== Cam Bushing Reamers ===== | ||
| \\ | \\ | ||
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| 11/16" for #1 thru #4 cam bushings. \\ | 11/16" for #1 thru #4 cam bushings. \\ | ||
| - | | Cam bushing reamers ((photo by decman of the XLFORUM http://xlforum.net/forums/showthread.php?postid=5016753)) | | + | | Cam bushing reamers ((photo by decman of the XLFORUM https://www.xlforum.net/forum/general-area/off-topic-general-discussion/166860-this-week-in-my-shop/page6?postid=5016753#post3644788)) | |
| |{{:techtalk:ref:tools:cam_bushing_reamers_by_decman.jpg?direct&300|}}| | |{{:techtalk:ref:tools:cam_bushing_reamers_by_decman.jpg?direct&300|}}| | ||
