2 mm screw stipped - is there an easy out tool to fit?
09-26-23, 05:44 PM
#1
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2 mm screw stipped - is there an easy out tool to fit?
Hi bike forum-ers. I'm trying to bleed a Hayes Dyno hydraulic brake lever. While attempting to remove the 2 mm bleed hole screw, I notice it's stripped. I can't find an easy out tool that small. And, I can't find an inexpensive replacement lever. Any ideas? TIA
09-26-23, 05:50 PM
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slightly larger allen?
try a 5/64 allen wrench-it maybe just large enough to grab the worn area.may want to heat the area with a heat gun some in case its loctited in place.
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09-26-23, 06:04 PM
#4
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good idea, but the screw won't hold the wrench...
09-26-23, 06:16 PM
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Last edited by bike_forum_geek; 09-26-23 at 06:31 PM.
09-27-23, 12:16 AM
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Have you tried a left hand drill bit? As others have mentioned, try heating in case of Loctite on threads.
Or, can you fit (lightly hammer in) a small torx bit, you mentioned 5/64 hex slips and 3.3/2 is too big, here is a link to torx bit dimensions and a T7 sacrificial bit might fit, if too loose, try epoxying it in
https://www.garagetooled.com/hand-tools/torx-bit-sizes/
Or, can you fit (lightly hammer in) a small torx bit, you mentioned 5/64 hex slips and 3.3/2 is too big, here is a link to torx bit dimensions and a T7 sacrificial bit might fit, if too loose, try epoxying it in
https://www.garagetooled.com/hand-tools/torx-bit-sizes/
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09-27-23, 01:15 AM
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Whatever caused the original head to strip might still be locking the screw in place of course.
09-27-23, 01:18 AM
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try a hardened T7 torx bit, not a 5/64" torx bit, for OEM tolerance reasons It'll likely be a "specialty" bit, but shouldn't be a diamond in the rough to find. Be sure to clean the screw head from loose debris (via pick tool & cotton swab laced with a grit grime cleaner) .
With a steady hand while applying firm pressure into the screw hole using the T7, give it the beans.
With a steady hand while applying firm pressure into the screw hole using the T7, give it the beans.
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09-27-23, 01:23 AM
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The caution I'd proceed with if using that is how far before it punctures thru the screw body & contaminating the system with debris, or should the extractor busts during the process, what is the fallback plan to extract the extractor? The material of that tool has a high rockwell & could leave you with a plan of replacing the assembly.
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09-27-23, 08:33 AM
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Only that they often don't work and only chew up the screw some more, but in that event you may still be able to drill it out and tap it for a larger thread.
09-27-23, 09:05 AM
#12
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try a hardened T7 torx bit, not a 5/64" torx bit, for OEM tolerance reasons It'll likely be a "specialty" bit, but shouldn't be a diamond in the rough to find. Be sure to clean the screw head from loose debris (via pick tool & cotton swab laced with a grit grime cleaner) .
With a steady hand while applying firm pressure into the screw hole using the T7, give it the beans.
With a steady hand while applying firm pressure into the screw hole using the T7, give it the beans.
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09-27-23, 09:13 AM
#13
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Have you tried a left hand drill bit? As others have mentioned, try heating in case of Loctite on threads.
Or, can you fit (lightly hammer in) a small torx bit, you mentioned 5/64 hex slips and 3.3/2 is too big, here is a link to torx bit dimensions and a T7 sacrificial bit might fit, if too loose, try epoxying it in
https://www.garagetooled.com/hand-tools/torx-bit-sizes/
Or, can you fit (lightly hammer in) a small torx bit, you mentioned 5/64 hex slips and 3.3/2 is too big, here is a link to torx bit dimensions and a T7 sacrificial bit might fit, if too loose, try epoxying it in
https://www.garagetooled.com/hand-tools/torx-bit-sizes/
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09-27-23, 01:22 PM
#15
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It's a long story. I still need to bleed this thing and replace the screw, which seems like a problem, apparently they're hard to find.
I used the magnet on the screw as it came out, if it hit the floor, it's lost :=(
I used the magnet on the screw as it came out, if it hit the floor, it's lost :=(
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09-28-23, 02:25 AM
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We work on a lot of rusted and abused bikes and often resort to this first for chewed up hex heads. We keep a large supply of sacrificial Torx bits on hand just for this method
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09-30-23, 08:16 AM
#18
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user error! Here's the final update.
Hayes Dyno hydraulic brake master cylinder bleed hole screw requires Torx wrench to remove. Using a 2mm wrench was my mistake.
Hayes support techs are great.
Lessons learned. Thanks all.
Hayes Dyno hydraulic brake master cylinder bleed hole screw requires Torx wrench to remove. Using a 2mm wrench was my mistake.
Hayes support techs are great.
Lessons learned. Thanks all.
