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Spindle Basics
Radial & Axial Runout Explained
In machining, runout refers to inaccuracies in a tool or piece of equipment that cause it to spin off its ideal axis. Spindle runout occurs when a spindle no longer rotates on its intended axis, which can result in: Inaccurate machine registration Issues with tolerance control Excessive chip load Poor part finishes Insufficient tool life Because of these risks, it’s recommended that you test your spindles for runout regularly and obtain necessary repairs as soon as possible. There are two types of spindle runout: radial and axial. Both can lead to similar issues.
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Delaying Spindle Service Causes More Damage, Costly Repairs
Running this spindle too long caused deformed ball bearings and damage to the outer race Damage to the outer race is consistent with prolonged operation after spindle exhibited initial signs of needing to be rebuilt Every spindle rebuilt by Northland Tool is backed by a 1-year warranty on parts and workmanship Over 2 years in the making A customer reached out to us over 2 years ago with a complaint that their spindle was starting to get noisy. We provided an estimated cost of $5,000 to rebuild.
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GPG: Grind-Plate-Grind Process Explained
When a cylindrical surface, such as the OD of a shaft or the ID of a tooling taper, becomes worn or damaged, we use a process referred to as grind-plate-grind (GPG) to restore dimensions to original OEM specification. First, we pre-grind, also referred to as “green grind,” to remove a thin layer of material and smooth any damage. Next, the part undergoes an electroplating process to apply a layer of hard chrome to the desired area. This builds up a durable surface that is slightly oversized than the final desired dimension.
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Manufacturing Spindle Parts
Since you can’t go to the local parts store and buy a front spindle housing and the lead times from the OEM can be measured in months not days, if they will even sell you the part. We manufacture replacement parts here to keep you up and running. Northland Tool manufactured this part, with micron tolerances, in 4 days and had our customer up and running in less than 7 days.
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Why You Should Use a Third Party Repair Specialist — Don’t Let the OEM Hold a Gun to Your Head
A consumer has essentially two options when searching for a spindle repair specialist — keep the job in-house with the original equipment manufacture (OEM) or entrust it with a third party company that specializes in custom spindle repair work.
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Machine Tool Spindle Bearing Lubrication: What To Know
Spindle bearings must be properly lubricated to maintain a film of lubricant between the rolling elements and the bearing raceways. Without lubrication, the rolling elements will have direct contact with the raceways, and this will result in heat, race deterioration, rolling element deterioration, cage disintegration, and ultimately bearing/spindle failure. There are several methods of lubrication used for spindles.
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5 Key Reasons Why Your Spindle Repair Shop Should Offer a Spindle Support Program
After a spindle repair is complete, one of the best tools a repair shop can provide its customers with is a ‘spindle support program.’ This program should offer premium content with reports and recommended corrective actions for incoming spindles, as well as tips, tricks, and how-tos to keep a rebuilt spindle in proper working condition when it is returned to the customer. Unfortunately, while support programs like these are commonplace in most industries, they are rare in the spindle repair business.
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