The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Era Specific and Model Specific > Ironhead Sportster Motorcycle Talk (1957-1985)
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

Active Threads
0 Oil, Filters and Spark Plugs
Last Post: Crusty
Posted On: 5 Minutes Ago
Replies: 75
Views: 3,071
0 Sportster Cobra seat
Last Post: cazz1000
Posted On: 17 Minutes Ago
Replies: 2
Views: 31
0 Glyptal?
Last Post: ryder rick
Posted On: 25 Minutes Ago
Replies: 23
Views: 793
0 Keep & Kill
Last Post: Crusty
Posted On: 51 Minutes Ago
Replies: 15,294
Views: 861,278
0 TC88A update ?
Last Post: npaisnel
Posted On: 53 Minutes Ago
Replies: 45
Views: 780
0 Trans/Year Interchangeability Question
Last Post: ferretface
Posted On: 54 Minutes Ago
Replies: 174
Views: 5,630
0 This is gonna hurt.
Last Post: Stairman
Posted On: 55 Minutes Ago
Replies: 7,920
Views: 1,618,583
0 This week on Craig's list
Last Post: Yakcm2
Posted On: 1 Hour Ago
Replies: 4,537
Views: 565,302
0 1969 Sportster 50th Anniversary T-Shirts
Last Post: Magneto Sportster
Posted On: 1 Hour Ago
Replies: 2
Views: 321
0 lengthen master cylinder
Last Post: 11alan111
Posted On: 1 Hour Ago
Replies: 13
Views: 114
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 1 Hour Ago
Replies: 46,181
Views: 7,318,691
0 Ironhead in the uk
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 2
Views: 47
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 2 Hours Ago
Replies: 16,337
Views: 1,590,829
3 Shaky Dave Recovery
Last Post: a-sad-anorak
Posted On: 3 Hours Ago
Replies: 149
Views: 15,083
0 Mid West Meet & Greet
Last Post: Stairman
Posted On: 4 Hours Ago
Replies: 114
Views: 9,496
0 Uh oh!!! Brass flakes/dust (a lot of it too) in my oil
Last Post: NGOT8R
Posted On: 4 Hours Ago
Replies: 148
Views: 6,229
0 Hot Chicks on Hot Bikes
Last Post: hammer6315
Posted On: 4 Hours Ago
Replies: 10,536
Views: 1,881,721
0 I'm almost afraid to ask this...
Last Post: madnss
Posted On: 6 Hours Ago
Replies: 18
Views: 2,272
0 Too HOT to ride?
Last Post: boomerguy
Posted On: 6 Hours Ago
Replies: 323
Views: 24,936
0 Food porn
Last Post: Crusty
Posted On: 9 Hours Ago
Replies: 1,778
Views: 319,057
0 Roads I'd like to ride.
Last Post: Nibelungen
Posted On: 10 Hours Ago
Replies: 2,791
Views: 242,861
0 Idle / transfer ports Q
Last Post: Billy1200
Posted On: 10 Hours Ago
Replies: 29
Views: 525
0 K&N Air Filter for old SE style backing plate?
Last Post: c1skout
Posted On: 13 Hours Ago
Replies: 5
Views: 237
0 Photo bucket
Last Post: NLXL
Posted On: 17 Hours Ago
Replies: 25
Views: 741
0 What kind of saddle do you use on your sporty?
Last Post: duffy
Posted On: 17 Hours Ago
Replies: 285
Views: 82,461
0 Poll: If you had to have a stock sporty, what would it be?
Last Post: Highly-Dangerous
Posted On: 17 Hours Ago
Replies: 587
Views: 178,715
0 1970 XLCH Cases - Blown Trans Corner
Last Post: savagegarden
Posted On: 18 Hours Ago
Replies: 10
Views: 405
0 Ride Report w/ 100's of Photos & Video - 8 States, 2 Countries & 2 Big Surprises
Last Post: DK Custom
Posted On: 18 Hours Ago
Replies: 49
Views: 3,562
0 Long intake
Last Post: RicThompson
Posted On: 19 Hours Ago
Replies: 46
Views: 1,686
0 Upside Down Monoshock IH - A Longterm Project
Last Post: paulc
Posted On: 20 Hours Ago
Replies: 154
Views: 32,222
More...
Members Birthdays
Reynoldston (79), showmebandit (66), Hoppy1313 (66), FredrikK (64), Toejam503 (64), YO MUDA (61), Altopass (60), tim 2007xl1200c (53), w9awx (47), 3xtrastout (41)
Sponsored Links
Reply
 
Share Thread Tools Display Modes
  #21  
Old 9th December 2019
Scott Scott is offline
Drag Race Champion
 
Join Date: Oct 2018
Posts: 386
Sportster/Buell Model: XL racebike in progress
Sportster/Buell Year: 1981
Other Motorcycle Model: Moto Guzzi V11 Lemans
Other Motorcycle Year: 2002
Reputation: 141356
Scott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant futureScott has a brilliant future
Default

Quote:
Originally Posted by JonesL View Post
Yoshi, Whitworth is the one with rounded thread shapes, not a sharp "V".
If you want to get into other 'interesting' threads there's also Acme, 29 deg. And a fun one I have to cut occasionally, Buttress thread.

As I've been told the story; Harley Davidson also had their own proprietary thread pitches in the teens. After the war department bought a bunch of Harleys for use during WW1 and found out that only Harley nuts and bolts would fit Harleys, Messrs. Harley and Davidson were told 'straighten up and fly right'. Something along the lines of 'Standardize or we aren't buying anymore Harleys' that brought H-D into the mainstream.
Harley still hadn't "straightened up" by WWII, as evidenced by the number of 1/4"-24 fasteners on my old 45 flatty.
Reply With Quote
  #22  
Old 9th December 2019
JonesL JonesL is offline
XL FORUM TEAM MEMBER
 
Join Date: Dec 2013
Posts: 579
Sportster/Buell Model: XL
Sportster/Buell Year: 1971
Reputation: 346524
JonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond repute
Default

Nah... Probably just NOS leftovers they wanted to use up before reordering.
__________________
"If a camel flies, no one will laugh if it doesn't get very far".
Reply With Quote
  #23  
Old 10th December 2019
brucstoudt's Avatar
brucstoudt brucstoudt is offline
Senior Master Custom Bike Builder
 
Join Date: May 2010
Location: Pottstown PA.
Posts: 13,503
Sportster/Buell Model: xlch
Sportster/Buell Year: 1960
Reputation: 301290
brucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond reputebrucstoudt has a reputation beyond repute
Default

JonesL acme threads are the ones I see used on c clamps with the flat threads?
__________________
72 1000cc barrels and heads, s&s 41/2'' flywheels, sifton cams, s&s super B w/ zippers thunderjet w/yost powertube, andrews gears,and shafts, competition engineering kevlar wet or dry clutch, 72 oil pump, morris magneto w/auto advance and single fire module, cycle electric generator w/electronic regulator,73 cu.in.
Reply With Quote
  #24  
Old 11th December 2019
JonesL JonesL is offline
XL FORUM TEAM MEMBER
 
Join Date: Dec 2013
Posts: 579
Sportster/Buell Model: XL
Sportster/Buell Year: 1971
Reputation: 346524
JonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond reputeJonesL has a reputation beyond repute
Default

Yep, you're right, brucstoudt. Acme is preferred when you want a thread that's robust and won't get clogged with dirt and stuff. Unlike a "V" thread, because of the Acme thread profile, it's pretty hard to ding 'em up so bad they won't work.

Another odd one I cut is a "buttress" thread. They're usually seen on old screw jacks and the breech plugs of LARGE breech loading cannons. The 90 deg. face is the load bearing side and the 45 deg. face acts like a gusset or shelf bracket.
Attached Images
File Type: jpg Buttress thread.jpg (77.6 KB, 9 views)
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Sponsored Links
All times are GMT +1. The time now is 19:57.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC