Headstock bearings

mikemm58 All Messages By This Member #108462 Hello, first post here... ? I have a 1947 SB "Heavy 10". Whenever I exert a little too much pressure when using a parting tool, I can hear 'banging or clattering' in the headstock. Is this an indication of worn out main bearings? ? Thanks for any help. ? Mike ?
Jim_B All Messages By This Member #108463 开云体育 Check the locking pin in the headstock bull gear. I would bet its worn under size.? Jim B, toggle quoted message Show quoted text On Dec 16, 2024, at 11:53?PM, mikemm58 via groups.io <mmcauley@...> wrote: ? Hello, first post here... ? I have a 1947 SB "Heavy 10". Whenever I exert a little too much pressure when using a parting tool, I can hear 'banging or clattering' in the headstock. Is this an indication of worn out main bearings? ? Thanks for any help. ? Mike ? -- Jim B
mike allen All Messages By This Member #108464 开云体育 ??? ??? Have ya done the rod through the spindle test ? Tell's ya what kind of clearance yer spindle bearings have . Are the spindle wicks in good shape ? animal On 12/16/24 8:35 PM, mikemm58 via groups.io wrote: toggle quoted message Show quoted text Hello, first post here... ? I have a 1947 SB "Heavy 10". Whenever I exert a little too much pressure when using a parting tool, I can hear 'banging or clattering' in the headstock. Is this an indication of worn out main bearings? ? Thanks for any help. ? Mike ?
Gary_K All Messages By This Member #108465 开云体育 Animal, can you be more specific about the ‘rod thru the spindle test’? I’m not sure what that is or how to do it - thanks. toggle quoted message Show quoted text On Dec 17, 2024, at 1:14?AM, mike allen via groups.io <animal@...> wrote: ? ??? ??? Have ya done the rod through the spindle test ? Tell's ya what kind of clearance yer spindle bearings have . Are the spindle wicks in good shape ? animal On 12/16/24 8:35 PM, mikemm58 via groups.io wrote: Hello, first post here... ? I have a 1947 SB "Heavy 10". Whenever I exert a little too much pressure when using a parting tool, I can hear 'banging or clattering' in the headstock. Is this an indication of worn out main bearings? ? Thanks for any help. ? Mike ?
Andrei All Messages By This Member #108466 开云体育 He means using this alignment bar: Get toggle quoted message Show quoted text From: [email protected] <[email protected]> on behalf of Gary_K via groups.io <themachinest0119@...> Sent: Thursday, December 19, 2024 10:42:02 PM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Headstock bearings ? Animal, can you be more specific about the ‘rod thru the spindle test’? I’m not sure what that is or how to do it - thanks. On Dec 17, 2024, at 1:14?AM, mike allen via groups.io <animal@...> wrote: ? ??? ??? Have ya done the rod through the spindle test ? Tell's ya what kind of clearance yer spindle bearings have . Are the spindle wicks in good shape ? animal On 12/16/24 8:35 PM, mikemm58 via groups.io wrote: Hello, first post here... ? I have a 1947 SB "Heavy 10". Whenever I exert a little too much pressure when using a parting tool, I can hear 'banging or clattering' in the headstock. Is this an indication of worn out main bearings? ? Thanks for any help. ? Mike ?
Gary Johnson All Messages By This Member #108467 It’s a glorified crowbar test. Put an indicator on the top of the spindle. Stick a piece of heavy bar stock in the spindle or chuck and lift upwards. Someone else can chime in with the allowable deflection but it’s something around 1 mil.? ? Gary
Gary_K All Messages By This Member #108468 开云体育 Ahh - got it. ?Thanks. toggle quoted message Show quoted text On Dec 19, 2024, at 11:15?PM, Gary Johnson via groups.io <gwj@...> wrote: ? It’s a glorified crowbar test. Put an indicator on the top of the spindle. Stick a piece of heavy bar stock in the spindle or chuck and lift upwards. Someone else can chime in with the allowable deflection but it’s something around 1 mil.? ? Gary
comstock_friend All Messages By This Member #108469 Here is the procedure direct from South Bend SB CE3458 Parts Manual, Page 8.jpg SB CE3458 Parts Manual, Page 8.pdf SB CE3458 Parts Manual, Page 8.pdf
mike allen All Messages By This Member #108470 开云体育 I think the procedure is tagged in the sticky's in South Bend forum over on Practical Machinist . It's also in the Ilion South Bend rebuild books I think animal On 12/19/24 8:25 PM, Gary_K via groups.io wrote: toggle quoted message Show quoted text Ahh - got it. ?Thanks. On Dec 19, 2024, at 11:15?PM, Gary Johnson via groups.io <gwj@...> wrote: ? It’s a glorified crowbar test. Put an indicator on the top of the spindle. Stick a piece of heavy bar stock in the spindle or chuck and lift upwards. Someone else can chime in with the allowable deflection but it’s something around 1 mil.? ? Gary
Gary_K All Messages By This Member #108471 开云体育 Thanks all! toggle quoted message Show quoted text On Dec 22, 2024, at 8:52?PM, mike allen via groups.io <animal@...> wrote: ? I think the procedure is tagged in the sticky's in South Bend forum over on Practical Machinist . It's also in the Ilion South Bend rebuild books I think animal On 12/19/24 8:25 PM, Gary_K via groups.io wrote: Ahh - got it. ?Thanks. On Dec 19, 2024, at 11:15?PM, Gary Johnson via groups.io <gwj@...> wrote: ? It’s a glorified crowbar test. Put an indicator on the top of the spindle. Stick a piece of heavy bar stock in the spindle or chuck and lift upwards. Someone else can chime in with the allowable deflection but it’s something around 1 mil.? ? Gary
mikemm58 All Messages By This Member #108472 Is the rod thru the spindle test done with the drive belt tensioned or at rest? ? Mike
Patrick All Messages By This Member #108473 you don't want any other stress on it. drive belt should be loose. toggle quoted message Show quoted text On Mon, Dec 23, 2024 at 5:12?PM mikemm58 via <mmcauley=[email protected]> wrote: Is the rod thru the spindle test done with the drive belt tensioned or at rest? ? Mike

Previous Topic Next Topic