Cobra
http://www.cobraamerica.com/?option=com_content&view=category&id=39&Itemid=81
Strength of this fastener is derived from the compression of the plates, mounted above and below the belt, with high tensile strength bolts. this “compression” distributes the splice tension across the full width of each fastener plate. The holding ability is, thereby, increased by not solely relying upon the bolts to resist pull-out.
Additional strength and resistance to pull-out is obtained from the specially formed teeth on each plate. These teeth imbed deep into the belt carcass, but without damaging the carcass fibers.
A tight butt splice is achieved through the exaggerated bolt hole spacing in the templet which forces the belt ends together. And, the Bolt Solid Plate Fasteners permit natural conformance with troughing or transition idlers.
The 140, 190 and 2 ¼ size fasteners are specifically designed for today’s thinner belting, allowing increased compression, greater reach-back and more fastener plates per belt width.
Bolt Solid Plate Fastener Selection Chart
wdt_ID | Fastener # | Belt PIW Rating (Up to) | Thickness Range | Recommended Minimum Pulley Diameter (90º Splice) Operating Tension: 75-100% of Belt Rating | Recommended Minimum Pulley Diameter (90º Splice) Operating Tension: 50-75% of Belt Rating | Recommended Minimum Pulley Diameter (90º Splice) Operating Tension: Under 50% of Belt Rating |
---|---|---|---|---|---|---|
1 | 1 | 160 | 3/16 to 7/16" | 12" | 10" | 8" |
2 | 140 | 225 | 3/16 to 7/16" | 14" | 12" | 10" |
3 | 190 | 330 | 5/16 to 9/16" | 18" | 16" | 14" |
4 | 1/1/02 | 300 | 7/16 to 11/16" | 18" | 16" | 14" |
5 | 2 | 440 | 9/16 to 13/16" | 30" | 28" | 24" |
6 | 2/1/04 | 620 | 9/16 to 1-3/16" | 36" | 34" | 34" |
7 | 2/1/02 | 450 | 3/4 to 1" | 42" | 42" | 42" |
8 | 3 | 560 | 15/16" & Over | 48" | 48" | 48" |
9 | SP6 | 150 | 1/4 to 1/2" | 14" | 12" | 10" |
Fastener Metals
Bolt Solid Plate fasteners come in a variety of metals for many applications.
Hinged bolt fasteners provide a flexible joint for belts operating over small pulleys. Because the joint is easily separated by simply removing the hinge pin, entire belt sections may be added or eliminated.
Designed as a compression fastener,the bolt hinged model is fastened to the belt ends with high strength bolts. These compress the plates into the belt cover. Additional holding capabilities is provided by the fastener teeth that imbed in the belt without damage to the belt carcass.
This combination distributes the splice tension across the entire plate width, while the teeth secure the fastener into the belt carcass to resist pull-out.
375X
Designed for belt conveyors with center distances less than 1000 feet.
For belts 1/4″ to 13/32″ thick.
Use on belts with mechanical fastener ratings up to 190 PIW.
Operates over 6″ minimum pulley diameter.
Fastener strips ensure a straight splice and faster installation.
Available in complete joints for various belt widths or in bulk fasteners without hinge pins.
550
For belts 1/4″ to 5/8″ thick.
Use on belts with mechanical fastener ratings up to 300 PIW.
Operates over 9″ minimum pulley diameters.
Available in complete joints for various belt widths or in bulk fasteners without hinge pins.
Most 550 steel joints are furnished with continuous, single-piece fastener strips (belt widths 24″, 30″, 36″, 42″ and 48″). These strips reduce installation time and insure a straight splice. These and other width joints are available, made up with individual fastener plates, for increased joint flexibility on deep-troughing idlers or where poor belt alignment is a problem.
750
For belts 9/16″ to 7/8″ thick.
Use on belts with mechanical ratings up to 400 PIW.
Operates over 20″ minimum pulley diameters.
Available in complete joints for various belt widths or in bulk fasteners without hinge pins. Individual steel plates are standard.
Fastener Selection Chart
wdt_ID | Fastener Size | PIW Mech. Fast. Rat. to: | Belt Thick. Range | Rec. Min. Pulley Dia. Oper. Tens.: 100% of Belt Rat. | Rec. Min. Pulley Dia. Oper. Tens. Under 75% of Belt Rat. |
---|---|---|---|---|---|
1 | 375X | 190 | 1/4" - 13/32" | 6" | 4" |
2 | 550 | 300 | 1/4" - 5/8" | 9" | 7" |
3 | 750 | 400 | 9/16" - 7/8" | 20" | 18" |
Ordering Numbers
Each “J” carton contains one complete belt joint. This includes: fasteners, hinge pin, filler tubing, bolts and nuts; assembly clips and a gauge rod for easy installation. (The connected fastener strips, 375X and certain widths of 550 strip, do not require clips, so none are included.)
Ordering Numbers for Steel Fasteners
wdt_ID | Belt Width | 375X with Nylon Covered Steel Cable Part # | 550 with Nylon Covered Steel Cable Part # | 750 with Nylon Covered Steel Cable Part # |
---|---|---|---|---|
1 | 12" | 375XJ12NC | - | - |
2 | 14" | 375XJ14NC | - | - |
3 | 16" | 375XJ16NC | - | - |
4 | 18" | 375XJ18NC | 550J18NC | - |
5 | 20" | 375XJ20NC | 550J20NC | - |
6 | 24" | 375XJ24NC | 550J24NC | - |
7 | 30" | 375XJ30NC | 550J30NC | - |
8 | 36" | 375XJ36NC | 550J36NC | 750J36NC |
9 | 42" | 375XJ42NC | 550J42NC | 750J42NC |
10 | 48" | 375XJ48NC | 550J48NC | 750J48NC |
11 | 60" | - | 550J60NC | - |
Ordering Numbers for Stainless Steel Fasteners with Nylon Covered Stainless Cable
wdt_ID | Belt Width | 375X with Nylon Covered Steel Cable Part # | 550 with Nylon Covered Steel Cable Part # | 750 with Nylon Covered Steel Cable Part # |
---|---|---|---|---|
1 | 18" | 375XSJ18NCS | 550SJ18NCS | - |
2 | 24" | 375XSJ24NCS | 550SJ24NCS | - |
3 | 30" | 375XSJ30NCS | 550SJ30NCS | - |
4 | 36" | 375XSJ36NCS | 550SJ36NCS | - |
5 | 42" | - | 550SJ42NCS | - |
6 | 48" | - | 550SJ48NCS | - |
Note: Part numbers above include a Nylon Covered Steel Cable for steel fasteners and a Nylon Covered Stainless Steel Cable for stainless steel fasteners. For other cables, replace the “NC” or “NCS” in the above part numbers with the Hinge Pin suffix letters given below.
Hinge Pins for Bolt Hinged Lacing
SC - Bare Steel Cable
For conveying gritty or highly abrasive material, Bare Steel Cable (SC) is recommended. Offered for numbers 375X and 550 fasteners only.
NCS - Nylon Covered Stainless Steel Cable
For greater corrosion resistance, the Nylon Covered Stainless Steel Cable (NCS) is furnished standard with Stainless joints. In is notrecommended for use with deep troughing idlers over 35 º.
NC - Nylon Covered Steel Cable
The nylon coating reduces corrosion and makes pin insertion easier.
NB - Nylon Covered Bronze Cable
For a non-magnetic joint, use fully non-magnetic Nylon Covered Bronze Cable (NB) with Everdur fasteners.
SSC - Bare Stainless Steel Cable
Where corrosion attacks steel cable hinge pins, Bare Stainless Steel Cable (SSC) does the job. Not recommended for use with deep troughing idlers over 35 º.
NAC - Nylon Covered Armored Cable
The right hinge pin for many mining conditions is the Nylon Covereed Armored Cable (NAC). Long service life is due to the patented hinge pin design. It combines a durable, flat wire wrap around the cable which is covered by nylon for smooth operation.
Note: Bulk fastener sets, replacement bolts and nuts and extra hinge pins are available. Please call our TFE Customer Service Department for availability.
Bolt Hinged Installation Tools and Supplies
Curved Templates
Used in conjunction with the “clip and gauge rod” method to install complete joints, the templet acts as a guide to accurately punch or drill holes into the belt ends. This insures proper fastener alignment.
Templets are available for all sizes of Bolt Hinged fasteners. They come in lengths for standard belt widths. See table below for ordering information.
Curved Templets for Bolt Hinged Fasteners
wdt_ID | Belt Width | 375X Part # | 550 Part # | 750 Part # |
---|---|---|---|---|
1 | 18" | 375X-18 | 518 | - |
2 | 20" | 375X-20 | 500 | - |
3 | 24" | 375X-24 | 524 | - |
4 | 30" | 375X-30 | 530 | - |
5 | 36" | 375X-36 | 536 | - |
6 | 42" | 375X-42 | 542 | - |
7 | 48" | 375X-48 | 548 | 748 |
8 | 60" | 375X-60 | 560 | - |
Hand or Power Tools for Bolt Hinged Fasteners
In addition to a templet or aligning holder, the following hand or power tools are required for installation: a punch or a boring bit (the punch is preferred for general use and where the belt cover is over 3/16″ thick); a wrench (a different wrench is required for stainless fasteners, which are furnished with slotted nuts); and a bolt breaker.
A power impact wrench cuts application time to approximately 50%. It should be used with a “quick change chuck” which adapts the tools to the square drive stud on an air or electric impact wrench.
Hand Tool Ordering Numbers
wdt_ID | Fastner Number | Bolt Hole Diameter | Punch Part # | Boring Bit Part # | Wrench Part # | Bolt Breaker Part # |
---|---|---|---|---|---|---|
1 | 375X & 550 | 1/4" | P1P | B1B | 100 (S1S*) | 110 |
2 | 750 | 3/8" | P3P | B3B | S3S | 113 |
*Note: S1S and HW1 are for use with Stainless Steel Nuts
Quick Change Chuck
To use power tools, a Quick Change Chuck is required. This adapts tools to the square drive stud on air or electric impact wrenches.
Quick Change Chuck for Bolt Hinged Fasteners
wdt_ID | Fastener Size | Drive Size | Part # |
---|---|---|---|
1 | 375X & 550 | 1/2" | 5552 |
The Ready Set Staple System
With the Ready Set Staple fastener system, an extended plate design separates the point of staple penetration from the line of belt flexing, thus eliminating splice fatiguing that results from sawing action at the point of attachment.
High tensile, stainless steel staple fasteners are furnished in strips with a bridge between each fastener plate. This strip design prevents individual parts from getting into the product being conveyed – eliminating a problem that may occur with some hook or teeth types of fasteners. The Ready Set Staples provide a strong splice, resistance to impact damage, and a smooth, unrippled joint that makes hinge pin insertion easier.
Ready Set Staples work between carcass fibers without severing them. Staples are hammer-driven through the belt, then clinched cross-wise to the belt, so that belt tension does not pull against the staples to unclinch them.
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