Precision Pulley & Idler (PPI) is a provider of high performance and innovative conveyor products and solutions. We are the #1 choice earned through unparalleled quality, delivery and customer service PPI entered the aggregate industry over 40 years ago and has been providing components that will outlast others in harsh environments. With products manufactured in Iowa, JW Bell is proud to represent PPI.
Idlers
Troughing Idler
PPI Troughing Idlers are manufactured to meet or exceed all Conveyor Equipment Manufacturers Association (CEMA) load standards. Our innovative frame design combined with idler rolls equipped with a proven seal system ensures long maintenance free service in the most demanding applications.
- Designed and manufactured for a long, trouble-free maintenance life
- Meets or exceeds CEMA Load ratings
- Equipped with three equal length sealed ball bearing rolls
- Reinforced frame design to shed material and avoid build-up
- Thick slotted footpads for solid secure base
- Minimal roll gap to avoid belt pinching
Impact Troughing Idler
PPI Impact Idlers are built with heavy duty frames to withstand shock at the loading zone. The rubber discs used on impact idlers are made of natural molded rubber ideal for absorbing impacts and shedding sticky material.
- Designed and manufactured for a long, trouble-free maintenance life
- Meets or exceeds CEMA Load ratings
- Equipped with three ball bearing rolls
- Reinforced frame design to shed material and avoid build-up
- Thick slotted footpads for solid base
- Minimal roll gap to avoid belt pinching
Flat Carrier
Flat Carrier Idlers are used with flat belts where a trough is not required to contain material. Flat Carrier Idlers applications include picking, sorting, feeders, and package handling. For applications where sticky material builds up on traditional steel idlers, Rubber Disc Flat Carrier Idlers can be used as an alternative.
- Designed and manufactured for a long, trouble-free maintenance life
- Meets or exceeds CEMA Load ratings
- Rolls are full thickness tubing for the length of the roll
- High-quality sealed ball bearing rolls
- Standard 4-1/2″ rise brackets
Return Idlers
Return idlers are used to support the belt as it cycles around to be loaded again. Standard PPI Return Idlers are available with a steel roll and 2 drop brackets. In abrasive and sticky applications Return Rubber Disc Idlers are an option to aid reducing material build up.
- Designed and manufactured for a long, trouble-free maintenance life
- Meets or exceeds CEMA Load ratings
- Return rolls are full thickness tubing for the length of the roll
- High-quality sealed ball bearing rolls
- Standard 4-1/2″ drop bracket for CEMA B, C and D
- Standard 7″ drop bracket for CEMA E
Rubber Return Idlers
The next step from a traditional rubber disc roll.
Possessing the same material shedding characteristics and wear properties of traditional rubber disc rolls, the Return Rubber Groove Roll (RRG) improves on an already great product. Built on the same steel tube as standard rubber disc returns the RRG is a single piece of rubber that is vulcanized onto the steel tube with the grooves machined into it. The single piece of rubber eliminates disc movement on the tube ensuring proper disc spacing the entire life of the roll.
Drum and Wing Pulleys
Drum Pulleys
Pro Duty Lagged Head Pulley
Our Pro Duty® features a profiled end disc similar to those found in high tension Turbine pulleys.
The Pro Duty® drum pulley represents a revolutionary change in the conveyor pulley industry. It is a single drum pulley line that can be used everywhere from the everyday light aggregate conveyor to the toughest Quarry Duty application. You no longer have to guess which pulley you need because the Pro Duty covers them all!
Profiled end discs are machined from solid steel with an integral hub rather than using a welded hub. Removing this welded hub eliminates the most common cause of pulley failure. The tapered profile end disc shape reduces the bending force transferred from the shaft into the pulley. The profiled end discs reduce stress on bushings and decrease incidence of shaft walking. Industry leading 10-year warranty.
Tail Pulley
A drum pulley built to last with features that magnify strength, balance and concentricity.
The toughest conveyor applications require ruggedness offered by a HDD. Steel rims, hubs and discs are fused into an integral component by a continuous submerged arc welded bond that maximizes pulley strength, balance and concentricity. The HDD is available with various hub and bushing systems.
Available in diameters from 12-54” Available in face widths up to 66”
Wing and Specialty Pulleys
Heavy Duty Wing
For aggressive belt cleaning the conventional wing pulley has been an industry standard. Its intermittent belt contact produces the impact required to dislodge some of the most problematic material build-up issues. Individual all-steel wings and gussets expel excessive build-up of material from the area of belt contact which enhances traction and reduces abrasion on both the belt and pulley. Where abrasion and excessive build-up conditions exist, the HDW pulley with self-cleaning action provides an excellent alternative to conventional drum style pulleys.
- Wing thickness 1/4″
- Reduces abrasion on both the belt and Pulley
- Expel excessive build-up of material on the belt contact
Quarry Duty Wing Pulley
Made for severe conditions where wing folding and abrasion issues are a concern.
The Quarry Max Duty Wing pulley is made for severe conditions where wing folding and abrasion issues are a concern. It resists wing folding by utilizing an end disc when necessary to keep wing heights ideal, short enough to resist folding, long enough to provide adequate rigidity. Ideally suited for harsh applications and for very abrasive conditions.
- 3/4″ X 2″ contact bar on 14″ diameter and up
- 5/8″ X 1-1/2″ contact bar on diameters larger than 10″ and less than 14″
- Reinforcement rings not required
Herringbone Wing
Designed for applications where conventional wings suffer from excessive material lodging and wing folding.
The PPI Herringbone Wing® Pulley was designed for those applications where conventional wings suffer from excessive material lodging and wing folding. The extreme wing angles of up to 45°, use the pulleys rotation to eject material out the sides of the pulley rather than recirculating it as a conventional wing often does. These extreme angles and optimized wing height, along with a center reinforcement disc, all combine to make an incredibly strong design that excels where others fail.
AR Bar available for high-wear applications
Available in diameters of 12” to 60”
Face widths of 12” to 78”
Available in XT or Keyless locking Assemblies
CEMA Herringbone Wing
Designed for those applications where conventional wings suffer from excessive material lodging and wing folding.
The PPI Herringbone Wing® was designed for those applications where conventional wings suffer from excessive material lodging and wing folding. The extreme wing angles of up to 45°, use the pulley’s rotation to eject material out the sides of the pulley rather than recirculating it as a conventional wing often does. These extreme angles and optimized wing height, along with a center reinforcement disc, all combine to make an incredibly strong design that excels where others fail.
Available in diameters of 6” to 20” and face widths of 12” to 66” Available in XT hubs and bushings
Beater Bar Pulley
Effective solution when aggressive belt cleaning is required.
The Beater Bar pulley is an effective problem solver for applications that require aggressive belt cleaning, where a conventional wing pulley is not an option due to size restrictions.
- Available in diameters of 4” – 60”
- Maximum face width available is 78”
Lagging Options
Vulcanized Herringbone
Improve traction, abrasive resistance to extend pulley and belt life.
PPI has complete, in-house, pulley lagging capabilities. Every step of the pulley manufacturing and lagging process is controlled internally, which assures quality, prompt delivery, and competitive pricing of lagged pulleys. The style of lagging required is usually influenced by operating conditions. SBR is the standard lagging material, however, neoprene and MSHA are available as well as many other compounds to suit a variety of applications.
Craft and EZ Lagging
Field replaceable lagging ideal for pulleys in locations where removal and replacement is difficult.
EZ-LAG™ is a field replaceable lagging that’s bonded to a 5” wide steel backer, similar to Craft-Lag®. However, unlike Craft Lag, EZ-LAG has perforations in the steel backer that allow it to be formed in the field to fit any pulley diameter 12” and over. It is ideal for pulleys in locations where removal and replacement is difficult.
Ceramic Lagging
Eliminates seams where failures often start.
PPI’s patented VEC Lagging starts with SBR or Neoprene lagging that is hot vulcanized onto a pulley. Our uniquely designed tiles are then embedded in the vulcanized lagging. It allows ceramic lagging to be applied to pulleys as small as 4” in diameter, something that cannot be achieved using cured lagging pads.
Impact and EZ Slider Beds
EZ Slider
Provides a variety of loading zone options and impact absorption for light to medium duty loads.
PPI’s EZ Slider series provides a variety of loading zone options. The EZI is equipped with rubber disc rolls that provide impact absorption for light to medium duty loads. For applications beyond the loading zone, the EZS has steel idler rolls in the center position providing excellent load support. The EZR is a light duty slider bed that can be used in the loading zone and beyond providing continuous support throughout the trough. All three versions are equipped with rails in the wing position to provide excellent support for skirt board sealing.
Medium Duty Slider
Ultra-high molecular-weight (UHMW) slider rails for skirt board sealing.
PPI is proud to offer the medium duty slider bed; a cost-effective solution for your impact and loading zone requirements. This bed is an ideal combination of impact absorption and belt support that promotes a tight seal against your skirting system.
True Impact System
Solves the problem of sealing skirt boards and the impact upon the belt.
PPI True Impact System (TIS) utilizes proven impact rolls. Along with a center support system, it cushions against the frame and gives the TIS a double action dampening system.
Take Up Frames
Precision Slide Tube
Slide tube design protects the screw from the environment. Side mount installation.
Many different styles of Take-Up Frames exist for providing tension to the return side of conveyor belts. That’s why at PPI we offer such an extensive line of Take-Up Frames with characteristics that make them rugged, easy to operate and to install.
Bushings
Computer-designed and specifically developed for conveyor pulley applications. PPI provides bushings with all the holding power you’ll ever need for conveyor pulleys.
OPTIONS:
XT
- 2″ per foot taper
- Self-seating – no need to hammer bushing in
- Less axial movement – reduces end disc stress and seats quicker
- High clamping force eliminates need for keyway on non-drives
- Bolts equally spaced for even draw-up
- More material in the barrel
- Full length hub engagement
- Flange deflection stores up cap screw torque for seating while running
- Easy removal
- Full size keys in max bores for size 50 and larger
QD
- Designed for a wide variety of applications
- 3/4″ per foot taper – self seating
- High clamping force eliminates need for key way on non-drives
- Flange deflection stores up cap-screw torque for seating while running
Return Roll Guards
The PPI Return Roll Guard provides a barricade at the pinch point created by the belt passing over a return roll. The 1 1/2” or 4 1/2” mounting brackets provide easy installation on 4”, 5” or 6” rolls utilizing the return bracket’s mounting bolts. While normally used on return rolls with seven feet or less vertical clearance from the ground or decking, it may be used on any return roll.
- Available in 1-1/2″ and 4-1/2″ drop
- Four guard positions for adjustment beyond normal belt sag
- Heavy Duty is also available with a 4-1/2″ drop featuring a 5/8″ bolt slot that will fit CEMA D idlers
Drive Shafts
PPI conveyor pulley shafting are a vital part of the total pulley assembly. Standard PPI shafting is AISI 1045. The higher carbon content in AISI 1045 results in a very strong steel that machines to a smooth finish. Normally, PPI uses T&P for shafting up through 5-15/16”. While, hot rolled and or forged shafting (depending upon size, availability and specifications) is used above a 6” diameter.
- Full machining and milling capabilities
- AISI 1045 is the standard shafting material
- 1018 is used then welding to the shaft is necessary
- 4140 and 4340 are available for high stress applications
- Shafting can be keyed and journaled to meet any specification
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