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Old 02-16-2019, 05:23 PM   #1
daveinaz
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Bit for Screw heads

Okay. Stupid question of the day. A #1 square bit is too small for these screws and a #2 is too big. A Phillips will fit in the top and turn screws that aren't too tight, but slip of you need more torque.

What exactly do I need to get to deal with the screws in this thing?
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Old 02-16-2019, 05:29 PM   #2
K0LCB
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Buy a good Robinson #2 bit
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Old 02-16-2019, 05:30 PM   #3
carl n susan
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The #2 Robertson (square head) has been what Montana has used since forever. The #2 bit should fit. I don't know if I have ever seen a #1 screw in a Montana.
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Old 02-16-2019, 06:29 PM   #4
daveinaz
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Thanks. I’ll try to find a decent #2 Robertson.
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Old 02-17-2019, 05:47 AM   #5
Slow Hand
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When I bought a socket set for my 5er it had a set of square bits in there. I got them at HD. Husky brand I believe.
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Old 02-17-2019, 06:05 AM   #6
Dave W
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Just go to Lowe's or Home Depot and buy a good brand name. I do stay away from DeWalt Robertson and twist drill bits these days but the Bosch, Makita and Vermont American still seem to work well. As far as #1 Robertsons, yes, there are a few such as in the pancake LED light fixture attaching screws and cabinet hinges (at least in on our HC). Haven't found any #3 though (yet!)
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Old 02-17-2019, 06:42 AM   #7
daveinaz
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Quote:
Originally Posted by Dave W View Post
Just go to Lowe's or Home Depot and buy a good brand name. I do stay away from DeWalt Robertson and twist drill bits these days but the Bosch, Makita and Vermont American still seem to work well. As far as #1 Robertsons, yes, there are a few such as in the pancake LED light fixture attaching screws and cabinet hinges (at least in on our HC). Haven't found any #3 though (yet!)
Yes, thatís what had me baffled. I had both #1 & #2 square bits, but apparently the Chinese factory had poor tolerances and made the #2 too big. Iíll grab a quality brand one today.
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Old 02-17-2019, 09:07 AM   #8
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A couple of minutes with a file will make that worthless bit useful again.
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Old 02-24-2019, 02:54 PM   #9
bou0146
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Quote:
Originally Posted by daveinaz View Post
Okay. Stupid question of the day. A #1 square bit is too small for these screws and a #2 is too big. A Phillips will fit in the top and turn screws that aren't too tight, but slip of you need more torque.

What exactly do I need to get to deal with the screws in this thing?
Robinson screwdrivers come in yellow (#4) green (#6) red (#8) black (#10). All the screws in your 8unit should be #8, so a red handle #8 Robinson screwdriver should work
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Old 02-24-2019, 03:05 PM   #10
rohrmann
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Originally Posted by bou0146 View Post
Robinson screwdrivers come in yellow (#4) green (#6) red (#8) black (#10). All the screws in your 8unit should be #8, so a red handle #8 Robinson screwdriver should work

Robertson drive sizes are 00, 0, 1, 2, 3, and 4. The ones commonly used on these rigs is #2.

https://en.wikipedia.org/wiki/List_o...ives#Robertson
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Old 02-24-2019, 03:48 PM   #11
StageCoachDriver
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Montana actually supplied 2 #2 square head drivers, both on flex shafts with my unit. BTW, don't shop at Harbor Freight for this kind of tool.
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