Case Study: Need to Protect a Bearing? PTI Has You Covered.

PTI Engineers love a challenge. An OEM needed more protection for their bearings in a high contaminant environment. What did PTI do? Read on for a full run-through…

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Background: A major equipment manufacturer placed an order for 18 (9 expansion + 9 non-expansion) SRE-FB4-300 4-bolt flange mounted units. The units were destined for a land roller used in the Farming Industry to flatten land and compact the soil.

The Challenge: High levels of contaminants (dust, gravel, sand, etc.) are present in the application. And while the triple lip HNBR rubber seals that come standard are quite effective at keeping debris out, the customer wanted even more protection on both sides of the bearing to not only ensure longer bearing life, but to also help to prevent the seals from failing. However, a standard open end cover wouldn’t fit due to limited space at the back of the bearing closest to the roller.

The Solution: To protect the front of the bearing: PTI recommended a standard closed front cover. To protect the back of the bearing: PTI engineers designed a lower profile custom bolt-on back plate with a proprietary dust excluder seal. After sharing a 3D printed model of the back plate, which the customer promptly approved, PTI custom fabricated back plates for the application. PTI then drilled and tapped holes in the housings to accept both the front and back plate.

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The Result: PTI shipped out the modified units. After installing and running the equipment for several weeks, the customer has since placed multiple orders for several hundred additional units.

PTI’s Ability: PTI maintains a focus on ingenuity and a passion for enabling our customers to do more. It isn’t just what we do – it’s who we are.

Click here to view the PDF of this case study. Do you need help with creating new or improving on existing equipment? Contact us to find out how our engineers can help.

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About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. View our products, other case studies, videos and more at www.ptintl.com.

Mounting Methods (Part 4 of 4): Tapered Adapter Sleeve

(This is the fourth and final installment of a four-part series examining the Four Shaft Attachment Methods for Mounted Ball Bearings…)

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PTI offers all four (4) shaft locking mechanisms for mounted (aka “housed”) ball bearings:

  1. Setscrew Locking
  2. Eccentric Locking Collar
  3. Concentric Clamp Collar
  4. Tapered Adapter Sleeve

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Let’s examine the fourth option: PTI GSH and UK series mounted ball bearings have a tapered bore and are secured to the shaft using a tapered adapter assembly. GSH and UK series tapered adapter assemblies consist of a tapered adapter sleeve, a lock washer and a lock nut. As the adapter is tightened using a spanner wrench, the adapter is drawn through the bearing and tightened to the shaft. Because the contact of the bearing is evenly distributed around the shaft, it provides the most concentric/ideal fit. Read on to learn more…

KEY FEATURES OF THE TAPERED ADAPTER SLEEVE: 

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  • Easy to Install
  • Concentric Grip to the Shaft
  • Provides a More Balanced Fit, Ideal for Medium to High Speeds

*Note: This bearing has the highest purchase price and will take the longest to install, but allows for minimal shaft damage and highest possible speeds with the least amount of vibration.

HOW TO INSTALL THE TAPERED ADAPTER MOUNTED BALL BEARING:
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  • Slide the assembly onto the shaft
  • Hold-down bolts for adapter mounted units should be tightened after the bearing is locked to the shaft
  • Snug locking nut by hand on each bearing noting the hold-down bolt hole position.
  • Once positioned into place, tighten the adjusting nut, drawing the adapter through the bearing clamping down onto the shaft
  • Check mounting bolt holes to insure adequate bolt clearance will remain after tightening.
  • Reposition the bearing if necessary.
  • Take care to ensure the locknut is not overtightened, as this can eliminate the bearing internal clearance, resulting in premature bearing failure
  • Tighten to the proper torque per Chart 3 below (from our Mounted Ball Bearing Installation Manual)
  • Re-check hold down bolts after 24 hours of operation to insure nothing has loosened. This check should become part of periodic maintenance including re-lube intervals

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DID YOU KNOW?

  • When tightening, the axial movement of the bearing will be less than 1/32” if starting from a snug position
  • Flange Bearings may require a shim behind the flange if a gap remains after mounting to avoid bearing pre-load.
  • L10 Life = the expected life of the bearing under normal conditions. Factors affecting bearing life include temperature, ambient conditions (presence of moisture, dust, dirt and other contaminants) and lubrication/maintenance practices.
  • PTI has the product, engineers, and experience to help you choose the ideal mounting method for your application.

ADDITIONAL RESOURCES:

We hope you enjoyed this four part series!
Click here to access Part One: Setscrew Locking, Part Two: The Eccentric Locking Collar, and Part Three: The Concentric Clamp Collar.

* * *

About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. Check out other videos, information and more at www.ptintl.com.

Mounting Methods (Part 3 of 4): The Concentric Clamp Collar

(This is the third of a four-part series examining the Four Shaft Attachment Methods for Mounted Ball Bearings…)

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PTI offers all four (4) shaft locking mechanisms for mounted (aka “housed”) ball bearings:

  1. Setscrew Locking
  2. Eccentric Locking Collar
  3. Concentric Clamp Collar
  4. Tapered Adapter Sleeve

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Let’s examine the third option: PTI’s “CL” Series Concentric Clamp Collar mounted bearings use a black oxide coated collar and a slotted inner ring. When tightened, “CL” series units are concentrically locked in place without marring the shaft, allowing for reduced vibration.

KEY FEATURES OF THE CONCENTRIC CLAMP COLLAR: 

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  • Easy to Install
  • Minimal Shaft Damage
  • Concentric Grip to the Shaft
  • Provides a More Balanced Effect Ideal for Medium to High Speeds

*Note: this mounting method is helpful to minimize vibration.

HOW TO INSTALL THE CONCENTRIC CLAMP COLLAR MOUNTED BALL BEARING:
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  • Once the bearing is on the shaft, tighten the collar using an Allen wrench or torque wrench (to ensure locking torque is ideal – see Chart 4 below from our Mounted Ball Bearing Installation Manual)
  • Re-check tightness of the collar after 24 hours of operation to insure nothing has loosened. This check should become part of periodic maintenance including re-lube intervals

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DID YOU KNOW?

  • Wrenches or drivers should be kept in good condition (flats not rounded over) to prevent damage to the set screws and to allow proper tightening.
  • Set screws can be replaced to maintain holding power without replacing the entire bearing.
  • L10 Life = the expected life of the bearing under normal conditions. Factors affecting bearing life include temperature, ambient conditions (presence of moisture, dust, dirt and other contaminants) and lubrication/maintenance practices.
  • PTI has the product, engineers, and experience to help you choose the ideal mounting method for your application.

ADDITIONAL RESOURCES:

Click here to access Part One: Setscrew Locking, Part Two: The Eccentric Locking Collar, and Part Four: The Tapered Adapter Sleeve.

* * *

About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. Check out other videos, information and more at www.ptintl.com.

Mounting Methods (Part 2 of 4): Eccentric Locking Collar

(This is the second of a four-part series examining the Four Shaft Attachment Methods for Mounted Ball Bearings…)

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PTI offers all four (4) shaft locking mechanisms for mounted (aka “housed”) ball bearings:

  1. Setscrew Locking
  2. Eccentric Locking Collar
  3. Concentric Clamp Collar
  4. Tapered Adapter Sleeve

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Let’s examine the second option: The Eccentric Locking Collar is a very popular locking mechanism for securing a mounted bearing to the shaft, second only to the Setscrew Locking method. Read on to learn more…

KEY FEATURES OF THE ECCENTRIC LOCKING COLLAR MOUNTED BALL BEARING: 

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  • Easy to Install
  • Relatively Low Market Price
  • Uni-directional
  • Minor Shaft Damage
  • Low to Medium Speeds

*Note: this shaft attachment method is unidirectional and NOT intended for reversing loads. Eccentric locking collar mounted bearings contact the shaft over a larger surface area compared to setscrew mounted bearings. This can reduce shaft damage and fretting corrosion.

HOW TO INSTALL THE ECCENTRIC LOCKING COLLAR MOUNTED BALL BEARING:
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  • Slide the eccentric collar against the mating end of the insert inner race.
  • Snug the collar on the mating eccentric in the direction of shaft rotation.
  • Place a mild steel bar inside the hole provided by the collar and tap the collar sharply in the direction of shaft rotation and perpendicular to the shaft.
  • Tighten the setscrew in the collar to the proper torque (from our Mounted Ball Bearing Installation Manual).
  • To remove the bearing, loosen the setscrew, then tap the collar in the direction opposite the shaft rotation.
  • Re-check tightness of the setscrew and hold down bolts after 24 hours of operation to insure nothing has loosened. This check should become part of periodic maintenance including re-lube intervals.

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DID YOU KNOW?

  • Wrenches or drivers should be kept in good condition (flats not rounded over) to prevent damage to the set screws and to allow proper tightening.
  • Set screws can be replaced to maintain holding power without replacing the entire bearing.
  • L10 Life = the expected life of the bearing under normal conditions. Factors affecting bearing life include temperature, ambient conditions (presence of moisture, dust, dirt and other contaminants) and lubrication/maintenance practices.
  • PTI has the product, engineers, and experience to help you choose the ideal mounting method for your application.

ADDITIONAL RESOURCES:

Click here to access Part One: The Setscrew Locking, Part Three: The Concentric Clamp Collar and Part Four: The Tapered Adapter Sleeve.

 * * *

About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. Check out other videos, information and more at www.ptintl.com.

7 Key Factors When Selecting an Industrial PT Parts Provider

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Here are 7 Key Factors to consider to help ensure you’re choosing the right industrial power transmission parts provider:

  1. Product Inventory & Availability – Do they have the products you need WHEN you need them? What happens if you have an after-hours emergency?
  2. Product Expertise – How experienced is their team? Can they answer your questions quickly, correctly, and thoroughly?
  3. Engineering Know-How – Do they have seasoned engineers on staff available to help with your application needs?
  4. Commitment to Technology – Do they have the latest equipment to help ensure you’re getting quality parts every time?
  5. Customization Capabilities/Willingness to Work on Special Projects – Do they only offer “off the shelf” products, or can you trust them to be willing and able to develop a new or modified product for your specific applications?
  6. Flexibility – How accommodating are they? Do they have a reasonable minimum order? What’s their shipping cut-off time?
  7. Customer Service – Do they understand your needs and ask the right questions? And do they strive to re-earn your business with every order – without taking your business for granted?

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So…How does PTI Measure Up to the 7 Key Factors? 

  1. Product Inventory & Availability – PTI offers 25,000+ SKUs – most of which are available from stock at our 72,000 sq ft headquarters and warehouse. As an example of our stocking commitment, we offer over 700 housing types for mounted ball bearings through 140mm (Metric) and 4″ (American Standard). And our customer service team is on-call 24/7 for emergency service.
  2. Product Expertise – Our customer service team has an average tenure of over 12 years in the industry.
  3. Engineering Know-How – We have six (6) engineers on staff available for custom projects and application assistance.
  4. Commitment to Technology – With a a 3D printer for rapid prototyping, a laser etcher for private-label branding, a noise and vibration tester to detect and measure vibration levels, and multiple gauges and equipment to quality check parts, it’d be fair to say we embrace technology.
  5. Customization Capabilities/Willingness to Work on Special Projects – Our engineers regularly take on special projects when our customers need unique solutions. Want proof? Click here to view our case studies.
  6. Flexibility – Our minimum order is just $30, and our shipping cut off time is 3:00 p.m. EDT for same day shipping / 7:00 p.m. for customer pick-ups.
  7. Customer Service – PTI is proud to be ISO 9001 Certified. We continue to receive high marks for customer service from new and long-time customers. PTI revolves around our customers with individual attention, because to us – Every. Order. Matters.

We are proud to be our customers’ trusted partner for high quality mounted bearings and industrial power transmission products. If you’re new to PTI, we invite you to put the PTI difference to work for you today. View our products, find your local PTI sales rep, or contact us with your specific product needs.

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About PTI: Upon opening in 1994, P.T. International Corp. (PTI) has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. View our products, other case studies, videos and more at www.ptintl.com.

Mounting Methods (Part 1 of 4): Setscrew Locking

(This is the first of a four-part series examining the Four Shaft Attachment Methods for Mounted Ball Bearings…)

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PTI offers all four (4) shaft locking mechanisms for mounted (aka “housed”) ball bearings:

  1. Setscrew Locking
  2. Eccentric Locking Collar
  3. Concentric Clamp Collar
  4. Tapered Adapter Sleeve

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Let’s examine the first option: The Setscrew, also often referred to as “Setscrew Locking,” is the most popular locking mechanism for securing a mounted bearing to the shaft. Read on to learn more…

KEY FEATURES OF THE SETSCREW:

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  • Easy to Install
  • Lowest Purchase Price
  • Clearance Fit
  • Moderate Shaft Damage*
  • Low to Medium Speed

*Note: this shaft attachment method can cause fretting corrosion, making removal difficult after years of operation

HOW TO INSTALL THE SETSCREW MOUNTED BALL BEARING:
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  • After the shaft is aligned, tighten both set screws by hand
  • Then tighten the set screws alternately until the torque is reached (see Chart 4 below)
  • After 24 hours of operation, check the set screw torque and re-tighten if/as needed to ensure full locking to the shaft

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DID YOU KNOW?

  • Wrenches should be kept in good condition (flats not rounded over) to prevent damage to the set screws and to allow proper tightening.
  • Set screws can be replaced to maintain holding power without replacing the entire bearing.
  • L10 Life = the expected life of the bearing under normal conditions. Factors affecting bearing life include temperature, ambient conditions (presence of moisture, dust, dirt and other contaminants) and lubrication/maintenance practices.

ADDITIONAL RESOURCES:

Click here to access Part Two: The Eccentric Locking Collar, Part Three: The Concentric Clamp Collar and Part Four: The Tapered Adapter Sleeve.

* * *

About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. Check out other videos, information and more at www.ptintl.com.

Customizing for the Client by Going Feet First – a Case Study

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Background: Franklin Miller is a manufacturer of agricultural and waste water equipment. They created a new machine designed to reduce agglomerates for one of their customers that produces crop fertilizer.

The Challenge: Due to limited available space in the application, the OEM’s design incorporated five parallel shafts requiring SAF222 housings positioned so close together that the feet couldn’t fit properly within the equipment. The OEM’s distributor had difficulty finding a manufacturer capable or willing to help with the required modifications until they reached out to PTI.

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The Solution: PTI engineers consulted with the customer and modified the SAF222 housings already in stock at PTI’s Charlotte, NC – USA headquarters to meet the space constraints of the equipment.

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Modifications included:

1. Machined feet off housings to fit in the equipment – essentially creating a tapped base design
2. Extended cap screws to allow for mounting to structure
3. Match marked housing caps and bases for easy pairing
4. Used split seals for easier assembly and removal of the split blocks. This modification also allowed the gear box and motor to stay in place and for easier impeller repair.

The Result: Franklin Miller received the ten modified housings within two months of the distributor’s initial inquiry to PTI. The retrofits allowed the machine builder to mount the housings in succession while meeting their confined space requirements.

PTI’s Ability: At PTI, we combine our engineering expertise with a focus on flexibility, ingenuity, and stock availability. Our customers’ successes are our successes.

Click here to view the PDF of this case study. Do you need help with creating new or improving on existing equipment? Contact us to find out how our engineers can help.

* * *

About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry.

Want to learn more about PTI? Click here to view our company overview video. View our products, other case studies, videos and more at www.ptintl.com.