Fanged Elevator Bolts

         
 

The fanged elevator bolt is characterized by two sharp teeth that are intended to penetrate the carcass of the elevator belt. Once the teeth penetrate the belt, they help keep the bolt from spinning which easily allows the lock nut to be tightened.

 

Fanged Elevator Bolt

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Material:

   
  Zinc Plated Steel or Stainless Steel (302)    
       
 

Features:

   
 

• Fangs Lock Bolt in Place When Tightening

   
 

• Large Bolt Head Diameter Resists Belt Pull Through

   
 

• Extensively Tested & Used in U.S. Grain Industry

   
 

• For Recessed and Flat Back Elevator Bucket Holes

   
  • Meets or Exceeds Industry Standards for Grade 2 Bolts    
       
  Product Questions? (309) 698-5611Phone or Email  Email    
       
 
  • Specifications
  • Bolt Hardware
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  • FAQ's
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  • Elevator Design Service
 
Size
(in.)
Head
Diameter (in.)
Fang
Height (in.)
Squared Shoulder
Height (in.)
Max. Torque
(ft. lbs.)
Package
Quantity
Package
Weight (lbs.)
1/4 x 3/4* 1 3/16 7/32 6 100 2.10
1/4 x 1 1 3/16 7/32 6 100 2.40
1/4 x 1-1/4 1 3/16 7/32 6 100 2.55
1/4 x 1-1/2 1 3/16 7/32 6 100 2.85
1/4 x 2 1 3/16 7/32 6 100 3.80
5/16 x 1* 1-3/16 1/4 1/4 13 100 4.10
5/16 x 1-1/4 1-3/16 1/4 1/4 13 100 4.45
5/16 x 1-1/2 1-3/16 1/4 1/4 13 100 4.80
5/16 x 1-3/4 1-3/16 1/4 1/4 13 100 5.20
5/16 x 2 1-3/16 1/4 1/4 13 100 5.55
5/16 X 2-1/4 1-3/16 1/4 1/4 13 100 6.05
5/16 X 2-1/2 1-3/16 1/4 1/4 13 100 6.50
3/8 x 1-1/4 1-1/4 9/32 1/4 23 100 6.55
3/8 x 1-1/2 1-1/4 9/32 1/4 23 100 7.10
3/8 x 1-3/4* 1-1/4 9/32 1/4 23 100 7.40
3/8 x 2 1-1/4 9/32 1/4 23 100 8.10
 
         
  * Stainless Steel Non-Stocking Size - Special Order
- Installed Bolt Torque Rating Dependent on Bucket and Belt Size
- Do NOT use Fanged Bolts on PVC 250 or Lighter Belting
 
         
 
Nuts, Washers and Spacers
     
    Elevator Bolt Hardware - Nuts, Washers & Spacers  
       
    Along with the various types and sizes of elevator bolts, 4B offers  
    all of the hardware required for each fastener.  
       
    For more information on all elevator bolt hardware specifications,  
    see page 44 of our full line catalog by clicking the link below.  
       
    More Info                 
       
       
       
       
         
 
Elevator Buckets
 

Elevator Buckets

4B manufacturers plastic, steel and stainless steel elevator buckets and cups for agricultural and industrial applications.  With over 400 different sizes and styles, 4B can supply the right product for your bucket elevator.

More Info

 

 
     
     
     
     
     
     
         
 
 
         
 
Elevator Belting
 

Elevator Belting

Rubber, PVC and FDA food quality belts are available. Belts vary by style and include: anti-static, high temperature, oil resistant, and flame retardant types.

More Info

 
     
     
     
     
     
     
         
 
 
         
 
Elevator Splices and Fasteners
 

Elevator Belt Splices & Fasteners

A range of mechanical splices and fasteners for use on most PVC, rubber and steel web elevator belts.

More Info

 
     
     
     
     
     
     
         
  How long of an elevator bolt do I need?  
  When installing buckets on an elevator belt, use this simple formula:  
  (belt thickness + bucket back thickness + washer thickness + nut thickness + 1/4 inch)  
     
  How thick of a belt do I need in order to use fanged bolts?  
  The table below should be referenced to help determine proper belt thickness.  Neither the fangs or squared shoulder  
  should be exposed or protrude through the belt after proper tightening.  
     
 
BELT THICKNESS GUIDE
Bolt Size Fang Height Squared Shoulder Height
1/4" 3/16" 7/32"
5/16" 1/4" 1/4"
3/8" 9/32" 1/4"
 
     
  What grade are 4B elevator bolts?  
  4B elevator bolts meet or exceed SAE Grade 2 / ISO Grade 5.8 standards.  The bolt grade guide below is for bolt  
  diameters of 1/4" (6 mm) to 1/2" (12 mm):  
     
 
BOLT GRADE GUIDE
SAE Grade ISO Grade Min. Tensile Strength (psi)
2 5.8 74,000
5 8.8 120,000
8 10.9 150,000
 
     
  What torque setting should I use?  
  An ideal installation will result in the elevator bolt head fitting snuggly just below the surface of the belt after tightening  
  (Image B).  However, never exceed the maximum recommended torque as shown in the tables below:  
     
 
MAXIMUM RECOMMENDED TORQUE FOR 4B ELEVATOR BOLTS SAE GRADE 2 OR 302 STAINLESS STEEL
Bolt Diameter in. lbs. ft. lbs. Nm
1/4" 72 6 8
5/16" 156 13 18
3/8" 276 23 31
1/2" 684 57 77
 
     
 
MAXIMUM RECOMMENDED TORQUE FOR 4B ELEVATOR BOLTS METRIC ISO GRADE 5.8
Bolt Diameter in. lbs. ft. lbs. Nm
M6 72 6 8
M7 115 10 13
M8 168 14 19
M10 336 28 38
M12 588 49 66
 
     
  What if the tolerance on bolt length?  
  See table below for specific tolerances.  
     
 
TOLERANCE ON BOLT LENGHT
Nominal Length No. 10
thru 3/8"
7/16
and 1/2"
9/16"
thru 3/4"
7/8"
and 1"
1-1/8"
thru 1-1/2"
Up to 1" +0.02
-0.03
+0.02
-0.03
+0.02
-0.03
----
----
----
----
Over 1" to 2-1/2" +0.02
-0.04
+0.04
-0.05
+0.06
-0.08
+0.08
-0.10
+0.12
-0.12
Over 2-1/2" to 4" +0.04
-0.06
+0.06
-0.08
+0.08
-0.10
+0.10
-0.14
+0.16
-0.16
Over 4" to 6" +0.06
-0.10
+0.08
-0.10
+0.10
-0.10
+0.12
-0.16
+0.18
-0.18
Over 6" +0.10
-0.18
+0.12
-0.18
+0.14
-0.18
+0.16
-0.20
+0.22
-0.22
 
     
  How do you install an elevator bolt?  
  The head of the elevator bolt should lie against the inside surface of the elevator belt with the nuts and washers on  
  the inside of the elevator bucket (Image A).  An ideal installation will result in the elevator bolt head fitting snuggly  
  just below the surface of the elevator belt (Image B).    
     
    Bolt Installation Image A   Bolt Installation Image B    
    IMAGE A   IMAGE B    
           
     
  Fanged bolts are a little more unique than other elevator bolts.  Install fanged bolts with fang tips in-line across the  
  width of the belt (Image C).  Placing the fangs in such a manner minimizes stresses caused by the flat head going  
  around the curved pulley.  Set the fangs into the belt cover by tapping them with a mallet.  Once the bolt is tightened, the  
  fangs will draw up into the belt and the head will seat properly as show above (Image B).  
     
 
Fanged Bolts Installed
 
  IMAGE C  
     
  My elevator bucket has recessed (curved) holes, can I use a flat washer?  
  Domed washers are recommended for recessed holes.  
     
  Can nylon threaded lock nuts (nylock) be used more than once?  
  It is not recommended to re-use nylock nuts.  Also, if temperatures reach 250° F or higher, nylock nuts should not  
  be used.  
     
  How can I prevent stainless steel bolts and nuts from locking up (galling)?  
  Stainless steel fasteners are susceptible to freezing up or locking up (galling).  During the tightening process, pressure  
  builds between the two contacting thread surfaces and breaks down the protective oxide coatings.  Without the oxide  
  coating, there is an increase in friction between the threads which can generate enough heat to fuse the nut and bolt  
  together.  The following actions can help prevent galling -  
     
      1 - Slow down installation RPM speed  
      2 - Use thread lubrication such as PTFE based coatings  
      3 - Use different stainless alloy grades for the bolt and nut  
      4 - Use regular hex nuts and lock washers instead of nylon insert lock nuts  
     
  Do you have any maintenance recommendations?  
  After initial installation, it is recommended that the bucket elevator be run for approximately four hours.  After which the  
  bolts should be re-tightened to ensure that there are no loose parts.  Periodic inspections are always recommended to  
  check for any issues that may occur during the life of the elevator, including checks for loose or damaged elevator bolts.  
     
  What is the maximum temperature for zinc plated bolts and nylon threaded lock nuts (nylock)?  
  Zinc plated bolts can be used on applications where the temperature is less than 390° F (200° C).  Zinc plated nylon  
  threaded lock nuts (nylock) have a maximum service temperature of 250° F (120° C).  
     
 
Fanged Elevator Bolt
Fanged Plastic A
Fanged Plastic B
Fanged Metal A
 
   
   
   
   
   
   
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Fanged Metal B
       
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  No videos currently available for this product.    
       
       
       
       
       
       
       
       
       
       
  At 4B we have designed hundreds of bucket elevators for many different industries from animal feed, grain storage and processing, flour milling, malting and brewing through to biomass, cement, coal, frac sand and other heavy industries. We can provide preliminary design information for upgrading your existing elevator or help with designing a new elevator.

Take advantage of 4B’s FREE worldwide technical support from a team of engineers specializing in the design of bucket elevators.

Using your key technical data, our engineers will provide the preliminary design and component details so that your elevator performs as expected and achieves required capacities and discharge characteristics.

To get a recommendation from our engineers, CLICK HERE to fill out our online form.