BB spindle thread (I'm making a DIY tool)
#1
Senior Member
Thread Starter
Join Date: Jun 2008
Location: SoCal
Posts: 1,886
Bikes: Lemond, Gios, Fuji, Trek, too many to write
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times
in
1 Post
BB spindle thread (I'm making a DIY tool)
What is the threading or pitch for a BB spindle? Looking to build a little DIY splined tool holder with a bolt and some washers.
#2
Really Old Senior Member
8MMx1.
8MMx1.25 is more common, but not what you want.
Get a couple different lengths.
I picked mine up at Car Quest, since they were close. The clerk was rather befuddled until he tried bolts out of the "other" 8mm drawer.
IF you have a spare spindle or nut, take it with you.
I've made a similar "tool", using a splined BB remover to also hold a PARK HCW 4 in place.
8MMx1.25 is more common, but not what you want.
Get a couple different lengths.
I picked mine up at Car Quest, since they were close. The clerk was rather befuddled until he tried bolts out of the "other" 8mm drawer.
IF you have a spare spindle or nut, take it with you.
I've made a similar "tool", using a splined BB remover to also hold a PARK HCW 4 in place.
Last edited by Bill Kapaun; 01-22-15 at 09:22 AM.
#3
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,095 Times
in
741 Posts
Bill is correct. The lengths that work are usually 40 mm to 50 mm. If you get a 50 mm long bolt you can use a stack of washers to fill in any gap.
#5
Really Old Senior Member
You might have better luck at a "good" auto parts store?
#6
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,095 Times
in
741 Posts
Neither are likely to have M8x1.0 mm bolts as M8x1.25 is far more common. I got mine at a very well equipped local hardware store and, as Bill noted, an auto parts store may be a better bet. If not, you will have to go to an industrial supply house like Grainger or McMaster-Carr or online from Bolt Depot or similar.
#7
Senior Member
Thread Starter
Join Date: Jun 2008
Location: SoCal
Posts: 1,886
Bikes: Lemond, Gios, Fuji, Trek, too many to write
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times
in
1 Post
Neither are likely to have M8x1.0 mm bolts as M8x1.25 is far more common. I got mine at a very well equipped local hardware store and, as Bill noted, an auto parts store may be a better bet. If not, you will have to go to an industrial supply house like Grainger or McMaster-Carr or online from Bolt Depot or similar.
Ahhh, okay thanks! I have a few auto stores nearby and also a Harbor Freight. Harbor Freight is where I got my giant Campy crank allen wrench. It was like 3 bucks compared to "bike shop" giant allen wrench . I think its like a 12mm or something (power torque Campy).
#8
Banned
Bene Sugg .. might get a better than soft mild steel .. a heat treated bolt @ auto/industrial hardware shop..
#9
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,095 Times
in
741 Posts
The bolt needed to clamp a bottom bracket tool to the bb spindle is not under a lot of stress as all it does is keep the tool from slipping off the splines. Nothing exotic is needed and any 8 mm bolt is pretty strong anyway.