Author Topic: Be careful when using cheap impact drivers  (Read 4348 times)

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ccmclane

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Be careful when using cheap impact drivers
« on: March 20, 2014, 02:14:32 PM »
The tip broke off in the screw I am trying to remove. Any suggestions for how to proceed now?
 

Offline grcamna2

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Re: Be careful when using cheap impact drivers
« Reply #1 on: March 20, 2014, 02:20:17 PM »
You might want to try a sharp point punch(not too sharp)and try backing out the screw that way..,as a last resort.
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Offline flybox1

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Re: Be careful when using cheap impact drivers
« Reply #2 on: March 20, 2014, 02:21:34 PM »
JIS - There is no substitute!
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Offline bjbuchanan

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Re: Be careful when using cheap impact drivers
« Reply #3 on: March 20, 2014, 02:22:09 PM »
Whack the broken tip with a punch or something, I bet it falls out
The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
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Offline 750K

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Re: Be careful when using cheap impact drivers
« Reply #4 on: March 20, 2014, 02:24:24 PM »
Dental pick or something similar should pull it out, you could try an automatic center punch to loosen it up.
77 Cb750, 78 Kz1000

Black 750K8

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Re: Be careful when using cheap impact drivers
« Reply #5 on: March 20, 2014, 02:26:40 PM »
bj is right it ought to come out easy get a small center punch and tap side to side once it breaks loose it should fall out.

ccmclane

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Re: Be careful when using cheap impact drivers
« Reply #6 on: March 20, 2014, 02:27:29 PM »
I have tried an automatic center punch and a pick. I will keep trying.

Offline 750K

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Re: Be careful when using cheap impact drivers
« Reply #7 on: March 20, 2014, 02:29:44 PM »
Try a small sharp chisel and small hammer, sounds like its in there good.
77 Cb750, 78 Kz1000

Offline Lostboy Steve

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Re: Be careful when using cheap impact drivers
« Reply #8 on: March 20, 2014, 02:33:05 PM »
I can assure you this happens to the best snap-on tips as well.
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Offline rb550four

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Re: Be careful when using cheap impact drivers
« Reply #9 on: March 20, 2014, 02:34:38 PM »
  Those cheap impacts are crap and the bits are weak too. I got my last one at NAPA, not that much more $, the tips fit nicer and they don't twist up and bugger up the heads like the cheap ones do.
  And then again , anything that you hit with a hammer can fail.
« Last Edit: March 20, 2014, 02:36:35 PM by rb550four »
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  http://forums.sohc4.net/index.php/topic,101678.0.html             
http://forums.sohc4.net/index.php/topic,137317.msg1550907.html#msg1550907

Offline Tugboat

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Re: Be careful when using cheap impact drivers
« Reply #10 on: March 20, 2014, 03:26:53 PM »
First - get yourself some JIS screwdrivers. They can be had for ~$20 for a set of 3.

Second - reverse drill bits. Get to know 'em.
If it's worth doing, it's worth doing twice.

Offline nortryder

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Re: Be careful when using cheap impact drivers
« Reply #11 on: March 20, 2014, 04:28:25 PM »
I've had that happen and have had good luck knocking out the broken bits with a hammer and pin punch

Offline thep1pe

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Re: Be careful when using cheap impact drivers
« Reply #12 on: March 20, 2014, 04:37:24 PM »
The tip broke off in the screw I am trying to remove. Any suggestions for how to proceed now?
 
+1 on the punch

Offline flybox1

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Re: Be careful when using cheap impact drivers
« Reply #13 on: March 20, 2014, 05:09:54 PM »
Drill it out. Replace the screw.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

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Offline edwardmorris

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Re: Be careful when using cheap impact drivers
« Reply #14 on: March 21, 2014, 10:41:36 AM »
For now you might just have to drill that screw out. I ran into the same issue, so Gordon/ilbikes loaned me his heavy duty JIS impact driver, got them all out intact. There is no substitute for JIS drivers, and you can't get a better deal than Gordon. Not sure if he has any left but you might wanna consider PMing him.

ccmclane

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Re: Be careful when using cheap impact drivers
« Reply #15 on: March 21, 2014, 10:06:40 PM »
Drilling it out did the trick.  Many thanks for the constructive advice.

Offline Puntas13

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Re: Be careful when using cheap impact drivers
« Reply #16 on: March 22, 2014, 06:49:25 PM »
A magnet will pull those out easily.

Offline 754

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Re: Be careful when using cheap impact drivers
« Reply #17 on: March 22, 2014, 07:05:40 PM »
Those may be staked..them and starter clutch bolts..  Save the grief and just drill them out..
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Offline PeWe

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Re: Be careful when using cheap impact drivers
« Reply #18 on: March 23, 2014, 12:00:31 AM »
I drilled all those heads out for many years ago. I did not trust an impact driver, punching the aluminum cases. If they crack...?
Used a drill that made the heads into powder and did not harm anything else. Part away and could grip the screws and turn them out.
New black countersunk allen key bolts, no more problems, easy to remove them  25+ years later.
I have allen bolts everywhere I removed an x-head.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline grcamna2

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Re: Be careful when using cheap impact drivers
« Reply #19 on: March 23, 2014, 04:43:04 AM »
Good choice on those countersunk allen head PeWe.Do you use Loctite on them inside the cases ?
75' CB400F/'bunch o' parts'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline edwardmorris

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Re: Be careful when using cheap impact drivers
« Reply #20 on: March 23, 2014, 09:41:03 AM »
At least in my novice experience, the cases are pretty damn solid. I took a beast of an impact driver and foolishly tried to unscrew the staked flat screw in the shifter drum. This thing was so stuck, almost melded together with the drum itself, and after about a minute of going bananas with a hammer, it turned! All excited, I unscrew it, just to find out the damned thing broke in half! Not a thing on the cases anywhere despite my most foolish and ignorant attempt.

Offline PeWe

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Re: Be careful when using cheap impact drivers
« Reply #21 on: March 23, 2014, 10:21:04 AM »
Good choice on those countersunk allen head PeWe.Do you use Loctite on them inside the cases ?

No Loctite there.
I used blue Loctite 243 on my cam sprocket bolts only.
Important info about bolts. Normal bolts length is under the head, countersunk is the entire bolt head included.

Important to replace the small o-ring inside that part. Oil pressure.

EDIT. About impact driver...important to use big hammer ( or small sledge hammer covered in plastic). Small one make marks and dimples on the tool only, no force.
I use this a lot. Bought it when I restored my house, force oak planks together.
« Last Edit: March 23, 2014, 10:36:26 AM by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline grcamna2

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Re: Be careful when using cheap impact drivers
« Reply #22 on: March 23, 2014, 12:58:01 PM »
Good choice on those countersunk allen head PeWe.Do you use Loctite on them inside the cases ?

No Loctite there.
I used blue Loctite 243 on my cam sprocket bolts only.
Important info about bolts. Normal bolts length is under the head, countersunk is the entire bolt head included.

Important to replace the small o-ring inside that part. Oil pressure.

EDIT. About impact driver...important to use big hammer ( or small sledge hammer covered in plastic). Small one make marks and dimples on the tool only, no force.
I use this a lot. Bought it when I restored my house, force oak planks together.

Thanks for the tech. assistance PeWe.That hammer you have looks like a "dead blow" hammer which is a tough plastic hammer filled w/ many round steel balls inside that move around a bit inside;is that the type of orange colored hammer you have in the image you posted ?
   Bill
75' CB400F/'bunch o' parts'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline PeWe

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Re: Be careful when using cheap impact drivers
« Reply #23 on: March 23, 2014, 01:14:31 PM »

That hammer you have looks like a "dead blow" hammer which is a tough plastic hammer filled w/ many round steel balls inside that move around a bit inside;is that the type of orange colored hammer you have in the image you posted ?
   Bill

Yes, that hammer with relatively soft surface is very useful.
Last time I used it for bending the small plates under my new CB750 tank tank keeping the trims in place. The weight helps to bend or put things in place. Useful as support as well. Used it under the front part of engine during the restore... help engine/swing arms bolts in place as well...

About thread lock as Loctite. Use it with care. I had huge problems removing the clutch nut when it got Loctite back in the days. I had to grind it off completely and brake it wide open with force with my orange hammer and chisel after grinding it open. Cannot been blue 243.

I have used blue 243  when the threads feels weak. Last time I repaired with new threads heli coil type. Cam chain tensioner housing with 3 bolts and the middle long M6 bolts on head and head cover.
M6 threads in alu will fail, if not torquing them, when removing when the soft metal is stuck on the bolt.
My cheap grey low cost thread coils worked much better than expensive purple or blue from famous brand. The latter one got a leftover when braking the thread off so the bolt bottomed in threads. No problems with the cheap ones.
Threads for the exhaust bolts (M8) got copper paste as heat safe lubrication.

« Last Edit: March 23, 2014, 01:31:16 PM by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline karter

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Re: Be careful when using cheap impact drivers
« Reply #24 on: March 24, 2014, 11:43:17 AM »
Before you use an impact driver to loosen the screws , grind the tip or nose of the Phillips bit . Most Phillips head bits will shatter because the tip is bottoming in the screw . I've used the same Snap-on impact driver and bits for the past 30 years and after grinding the tip down haven't broken a bit since .

Offline 74750k4

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Re: Be careful when using cheap impact drivers
« Reply #25 on: March 31, 2014, 02:01:38 PM »
Might be good to wear safety glasses too...  a piece of steel flying into your eye could ruin your whole day!

Offline lone*X

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Re: Be careful when using cheap impact drivers
« Reply #26 on: April 01, 2014, 08:28:41 PM »
+1 of grinding the tip off.  I still have my early 1970's Craftsman impact driver and all the original trimmed bits and never a broken one.   Also allows the bit to seat deeper into the Philips or JIS head for a better grip.  If it bottoms out on the original point chances are the blades are not fully seated in the screw slots.  I learned this from a boat mechanic who had to deal with corroded screws in outboards used in salt water.
Lone*X  ( Don )

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Offline RRRToolSolutions

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Re: Be careful when using cheap impact drivers
« Reply #27 on: April 02, 2014, 07:21:53 AM »
Guys, I've got more of those Heavy Duty JIS Impact drivers in-stock. I'm also having an "April Tools" sale right now.

Here is a link with more details -

http://forums.sohc4.net/index.php?topic=135828.0

Best Regards, Gordon
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Offline grcamna2

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Re: Be careful when using cheap impact drivers
« Reply #28 on: April 02, 2014, 07:30:43 AM »
Guys, I've got more of those Heavy Duty JIS Impact drivers in-stock. I'm also having an "April Tools" sale right now.

Here is a link with more details -

http://forums.sohc4.net/index.php?topic=135828.0

Best Regards, Gordon

I ordered and just received one of those Made in Japan Vessel 2500's from you Gordon.The only thing different is the current one comes in a plastic pouch rather than a metal case,same Great product.
                                                                Thanks again for finding this for me.  :)
                                             
75' CB400F/'bunch o' parts'
  I love the small ones too !
Do your BEST...nobody can take that away from you.