TR Self-Clinch Installation Problems and Solutions
Contents
Contents TR Rivet Bushes - Product Information - How Does It Work - Range TR Self-Clinch - Product Information - How Does It Work - Range - Ten Most Commonly Asked Questions - Installation Problems and Solutions
Page No. 3 3 5 6 14 14 15 16 23 25
Fastener Training Manual : 2
Notes:
TR Rivet Bushes Product Information Range available: • • • • • • • • • •
Hexagon Round Serrated Face Serrated Face Mini Serrated Face Standoff Serrated Face Standoff Mini Tank Bush Hankloc Wunlok Swage Nut
Back Spigot
Front Body
Fastener Training Manual : 3
TR Rivet Bushes Product Information
Notes:
• A TR Rivet Bush is designed to enable the installation of a female (internal) thread in sheets that are too thin to be tapped by traditional methods. • The TR Rivet Bush, (which is easily the market leader in the UK), is our own patented product. • It was invented in 1928 by a company called Hall & Kay, hence the early name Hank. • In 1980 the trade name of Hank and patent were acquired by TR. • We are the sole manufacturer of the genuine Rivet Bush anywhere in the World!
Fastener Training Manual : 4
TR Rivet Bushes How Does It Work?
Notes:
A pre-specified hole is drilled or punched into the parent material (or sheet metal) and the Spigot of the product is introduced. Rivet Bush
Sheet Material The back is then supported using an anvil or other suitably flat surface and by applying a Profiled Punch, the Spigot of the Rivet Bush is riveted over.
Anvil
Profile
Profiled Punch Fastener Training Manual : 5
TR Rivet Bushes Range
Notes:
Serrated Face Rivet Bush
Hexagon Rivet Bush
Fastener Training Manual : 6
TR Rivet Bushes Range
Notes:
Round Rivet Bush
Fastener Training Manual : 7
TR Rivet Bushes Range
Notes:
TR Serrated Face Mini This product is identical to the Serrated Rivet Bush except that it has reduced body dimensions. It is used extensively in the electronics industry.
Some important changes have recently been made to the design of the TR Serrated Face Rivet Bush. Specifically the Spigot length, which is now available in a greater variety, (i.e. to cater for a wider range of sheet thickness) and has been re-engineered to offer a more accurate fit. Up until recently, all our Rivet Bushes were manufactured to suit a specific gauge size, (swg or standard wire gauge). In response to customers’ demands, predominately as a result of the change in standard sheet thickness from imperial (swg) to metric; the Rivet Bush Mini is now produced with a spigot length to cater for metric sheet thicknesses. Because there are more metric variations when compared to ‘swg’, we have introduced additional spigot length into the range. Consequently, it is imperative you establish the actual thickness of the sheet in millimetres when enquiring, quoting or ordering TR Rivet Bush Minis. Fastener Training Manual : 8
TR Rivet Bushes Range
Notes:
The TR Rivet Bush Mini is available in the following sizes:To Suit Sheet 0.60mm 0.80mm 1.00mm 1.20mm 1.50mm 1.60mm 2.00mm 2.50mm 2.70mm 3.00mm
Code 06 08 10 12 15 16 20 25 27 30
3.30mm 4.10mm 4.90mm
33 41 49
Fastener Training Manual : 9
TR Rivet Bushes Range
Notes:
TR Serrated Face Rivet Bush Standoff Used in place of a traditional spacer and screw assembly and body heights are manufactured specifically to customer order. Thus in effect every one is a customer special.
TR Serrated Face Rivet Bush Standoff Mini As per the Serrated Face Rivet Bush Standoff, but with reduced body dimensions.
Fastener Training Manual : 10
TR Rivet Bushes Range
Notes:
TR Tank Bush The TR Tank Bush is a Blind Rivet Bush to minimise leakage.
TR Hankloc The Hankloc is a Rivet Bush that has undergone the Quadloc process. The four indents shown, simply de-pitch the last thread, effectively locking a screw when inserted from the spigot end.
Fastener Training Manual : 11
TR Rivet Bushes Range
Notes:
TR Wunlok The Wunlok Rivet Bush is specially designed for applications requiring a Self Locking Rivet Bush that can be re-used.
TR Swage Nut The TR Swage Nut is based upon the design of the Serrated Face Mini and is installed in much the same way as a Rivet Bush. It was developed specifically in response to our customers’ needs for a more flexible fastener.
Fastener Training Manual : 12
TR Rivet Bushes Range
Notes:
TR Swage Nut - Advantages • The Standard TR Swage Nut can be used in sheet metal as thin as 0.5mm. It has also been produced for sheets as thin as 0.12mm (five thou) • It can be installed into all sheet steels regardless of the hardness of the parent material. • The integrity and consistency of the fixing is not governed by the hardness of the parent material - a particular advantage when using 304 Stainless. • Being able to reduce the sheet thickness of the end product would represent a far higher pro-active cost reduction programme, without effecting productivity – customer benefit. • Swage Nuts can be easily replaced with the same product, or even by a TR Self Clinch Nut. • Traditionally, self clinch nuts that are installed incorrectly have to be removed, the hole in the sheet enlarged and a larger sized nut installed. • Swage Nuts suit existing standard self clinch hole sizes in sheet metal. • In many instances punches and anvils can be supplied to suit standard automated and manual insertion presses. • Swage Nuts can, in many instances, be used in self clinch automated feeding equipment without having to change the existing feed tubes etc. • The Swage Nut offers a flush fit on one side of the sheet. • Expensive equipment such as hydraulic or pneumatic presses are not needed to install the Swage Nut. A simple hammer and punch will suffice.
Fastener Training Manual : 13
TR Self-Clinch Product Information
Notes:
Range available: • • • • • • • • • • •
Stud Pin Nut Flush Nut Through Standoff Blind Standoff Clip-on Standoff Broaching Nut Broaching Standoff Floating Fasteners Panel Fasteners
TR Self-Clinch is our own registered trademark, we do not however, hold any patents on the following Self-Clinch products you will see. Our main competitor in the UK is PEM. When taking enquiries, just get the PEM part numbers and we can convert.
Fastener Training Manual : 14
TR Self-Clinch How Does It Work?
Notes:
A hole is punched into the parent sheet. The Self-Clinch product is introduced to the hole in the sheet. Self-Clinch product
Sheet Metal Ideally, the base of the sheet should be supported by an anvil or similar flat surface, however this can be reversed so the product is supported by the anvil. The punch must be applied using a squeezing action and not a blow or trauma type force.
Fastener Training Manual : 15
TR Self-Clinch Range
Notes:
TR Self-Clinch Stud
TR Self-Clinch Pin
Fastener Training Manual : 16
TR Self-Clinch Range
Notes:
TR Self-Clinch Nut
TR Self-Clinch Blind Nut
Fastener Training Manual : 17
TR Self-Clinch Range
Notes:
TR Self-Clinch Flush Nut The Flush Nut is designed to be totally flush on both sides of the sheet e.g. the overall height will be less than the sheet thickness.
TR Self-Clinch Through Standoff Like the Rivet Bush Standoff, the product below was designed to replace the traditional spacer and screw assembly. Unlike the Rivet Bush Standoff, it is sold in standard lengths.
Fastener Training Manual : 18
TR Self-Clinch Range
Notes:
TR Self-Clinch Blind Standoff The Blind version of the Standoff is particularly desirable for cosmetic reasons.
TR Self-Clinch Clip-on Standoff
Fastener Training Manual : 19
TR Self-Clinch Range
Notes:
TR Self-Clinch Broaching Nut Broaching products are for use in thermosetting plastics such as PCB and very soft aluminium.
TR Self-Clinch Broaching Standoff
Fastener Training Manual : 20
TR Self-Clinch Range
Notes:
TR Self-Clinch Floating Fasteners Floating Fasteners are available in Locking and Non Locking.
TR Self-Clinch Panel Fastener
Fastener Training Manual : 21
TR Self-Clinch Range
Notes:
TR Self-Clinch Recess Panel Fastener
TR Self-Clinch Low Profile Panel Fastener
Fastener Training Manual : 22
TR Self-Clinch
Notes:
The ten most commonly asked questions about self-clinch products. • Does the shape of a self clinching product alter during installation? No, the product does not deform in any way, meaning no riveting and crimping is required. • What holds the fasteners in the sheet? The squeezing force upon the fasteners causes the sheet metal beneath the head to cold-flow into the undercut of the product, locking it in place. • Do I need special equipment to install these fasteners? No, self clinching fasteners are installed using any type of parallel acting press which will squeeze the fastener into the material. • Will these fasteners fall out, twist or spin if excess tightening occurs? No, the typical torque out values are generally quite high compared to the rotational force that will be put into them. • Can a self clinching product be installed with a simple blow of a hammer or similar force? A self clinching fastener must be installed using a squeezing action. Sudden impact does not allow enough time for the material to cold-flow. • Are there self clinching fasteners to suit stainless steel sheet material? Yes, there are many self clinch fasteners available for stainless steel applications and will be made from specially hardened stainless steel.
Fastener Training Manual : 23
TR Self-Clinch
Notes:
The ten most commonly asked questions about self-clinch products. • Are there panel requirements when using self clinching products? There are two basic requirements. Firstly, the panel must be a softer material than the fastener that is going into it. Secondly, the panel / sheet material must meet the minimum sheet thickness required by that particular fastener. • Is there a maximum sheet thickness to be aware of before specifying self clinching fasteners? Generally, there is no specified maximum sheet thickness for sheets. However, some fastener types do specify a thickness range which includes their maximum. • Some self clinching fasteners have hexagonal shaped heads. Does a hexagonal shaped hole have to be punched to install these? All self clinching products are installed into a round punched hole. • Can self clinching fasteners be installed blind, if access to the other side is limited? Generally, you must have access to both sides of the sheet to install these properly, however there are some larger nuts which can be drawn in from one side using an impact torque wrench.
Fastener Training Manual : 24
TR Self-Clinch Installation Problems and Solutions Problem Fastener not sealed squarely
Possible cause Punch and anvil faces are not parallel. Panel cocked during installation. Poor holding power Inadequate installation force. Countersunk hole in panel.
Threads tight – sheet buckles Tight threads, cracked
Fasteners over squeezed. Shank lengths extend through sheet.
Panel buckles badly with stud in .040” to .059” (1 – 1.5mm) material Poor holding power in studs or standoffs in panel Poor holding power
Lack of countersunk in anvil.
Notes:
Solution Ensure punch and anvil are flat. Ensure large panels are held perpendicular to punch. Seat fastener against shoulder by applying more force or changing shut height of press. Do not countersink or deburr hole. Reduced installation force. Choose fasteners with proper shank length for sheet thickness. Provide countersink in anvil to specified dimensions.
Hole in anvil too Use anvil with hole large or chamfered. per catalogue dimensions. Die side of Punch hole under size and ream to panel thicker .093”/2.36mm may catalogue have hole too large dimensions or for fastener. change tooling to punch from opposite side. Fastener Training Manual : 25
TR Self-Clinch Installation Problems and Solutions Problem Head of flush head stud or standoff cups Edge of panel bulges
Possible cause Punch diameter too small or not hard and flat. Mounting hole violates specified minimum edge distance. Nut is over-squeezed.
Notes:
Solution Punch must be larger than head of stud or standoff. Restrain panel or bracket in fixture during installation or move mounting hole away from edge. Reduce installation force if possible.
Fastener Training Manual : 26
Contents TR Rivet Bushes - Product Information - How Does It Work - Range TR Self-Clinch - Product Information - How Does It Work - Range - Ten Most Commonly Asked Questions - Installation Problems and Solutions
Page No. 3 3 5 6 14 14 15 16 23 25
Fastener Training Manual : 2
Notes:
TR Rivet Bushes Product Information Range available: • • • • • • • • • •
Hexagon Round Serrated Face Serrated Face Mini Serrated Face Standoff Serrated Face Standoff Mini Tank Bush Hankloc Wunlok Swage Nut
Back Spigot
Front Body
Fastener Training Manual : 3
TR Rivet Bushes Product Information
Notes:
• A TR Rivet Bush is designed to enable the installation of a female (internal) thread in sheets that are too thin to be tapped by traditional methods. • The TR Rivet Bush, (which is easily the market leader in the UK), is our own patented product. • It was invented in 1928 by a company called Hall & Kay, hence the early name Hank. • In 1980 the trade name of Hank and patent were acquired by TR. • We are the sole manufacturer of the genuine Rivet Bush anywhere in the World!
Fastener Training Manual : 4
TR Rivet Bushes How Does It Work?
Notes:
A pre-specified hole is drilled or punched into the parent material (or sheet metal) and the Spigot of the product is introduced. Rivet Bush
Sheet Material The back is then supported using an anvil or other suitably flat surface and by applying a Profiled Punch, the Spigot of the Rivet Bush is riveted over.
Anvil
Profile
Profiled Punch Fastener Training Manual : 5
TR Rivet Bushes Range
Notes:
Serrated Face Rivet Bush
Hexagon Rivet Bush
Fastener Training Manual : 6
TR Rivet Bushes Range
Notes:
Round Rivet Bush
Fastener Training Manual : 7
TR Rivet Bushes Range
Notes:
TR Serrated Face Mini This product is identical to the Serrated Rivet Bush except that it has reduced body dimensions. It is used extensively in the electronics industry.
Some important changes have recently been made to the design of the TR Serrated Face Rivet Bush. Specifically the Spigot length, which is now available in a greater variety, (i.e. to cater for a wider range of sheet thickness) and has been re-engineered to offer a more accurate fit. Up until recently, all our Rivet Bushes were manufactured to suit a specific gauge size, (swg or standard wire gauge). In response to customers’ demands, predominately as a result of the change in standard sheet thickness from imperial (swg) to metric; the Rivet Bush Mini is now produced with a spigot length to cater for metric sheet thicknesses. Because there are more metric variations when compared to ‘swg’, we have introduced additional spigot length into the range. Consequently, it is imperative you establish the actual thickness of the sheet in millimetres when enquiring, quoting or ordering TR Rivet Bush Minis. Fastener Training Manual : 8
TR Rivet Bushes Range
Notes:
The TR Rivet Bush Mini is available in the following sizes:To Suit Sheet 0.60mm 0.80mm 1.00mm 1.20mm 1.50mm 1.60mm 2.00mm 2.50mm 2.70mm 3.00mm
Code 06 08 10 12 15 16 20 25 27 30
3.30mm 4.10mm 4.90mm
33 41 49
Fastener Training Manual : 9
TR Rivet Bushes Range
Notes:
TR Serrated Face Rivet Bush Standoff Used in place of a traditional spacer and screw assembly and body heights are manufactured specifically to customer order. Thus in effect every one is a customer special.
TR Serrated Face Rivet Bush Standoff Mini As per the Serrated Face Rivet Bush Standoff, but with reduced body dimensions.
Fastener Training Manual : 10
TR Rivet Bushes Range
Notes:
TR Tank Bush The TR Tank Bush is a Blind Rivet Bush to minimise leakage.
TR Hankloc The Hankloc is a Rivet Bush that has undergone the Quadloc process. The four indents shown, simply de-pitch the last thread, effectively locking a screw when inserted from the spigot end.
Fastener Training Manual : 11
TR Rivet Bushes Range
Notes:
TR Wunlok The Wunlok Rivet Bush is specially designed for applications requiring a Self Locking Rivet Bush that can be re-used.
TR Swage Nut The TR Swage Nut is based upon the design of the Serrated Face Mini and is installed in much the same way as a Rivet Bush. It was developed specifically in response to our customers’ needs for a more flexible fastener.
Fastener Training Manual : 12
TR Rivet Bushes Range
Notes:
TR Swage Nut - Advantages • The Standard TR Swage Nut can be used in sheet metal as thin as 0.5mm. It has also been produced for sheets as thin as 0.12mm (five thou) • It can be installed into all sheet steels regardless of the hardness of the parent material. • The integrity and consistency of the fixing is not governed by the hardness of the parent material - a particular advantage when using 304 Stainless. • Being able to reduce the sheet thickness of the end product would represent a far higher pro-active cost reduction programme, without effecting productivity – customer benefit. • Swage Nuts can be easily replaced with the same product, or even by a TR Self Clinch Nut. • Traditionally, self clinch nuts that are installed incorrectly have to be removed, the hole in the sheet enlarged and a larger sized nut installed. • Swage Nuts suit existing standard self clinch hole sizes in sheet metal. • In many instances punches and anvils can be supplied to suit standard automated and manual insertion presses. • Swage Nuts can, in many instances, be used in self clinch automated feeding equipment without having to change the existing feed tubes etc. • The Swage Nut offers a flush fit on one side of the sheet. • Expensive equipment such as hydraulic or pneumatic presses are not needed to install the Swage Nut. A simple hammer and punch will suffice.
Fastener Training Manual : 13
TR Self-Clinch Product Information
Notes:
Range available: • • • • • • • • • • •
Stud Pin Nut Flush Nut Through Standoff Blind Standoff Clip-on Standoff Broaching Nut Broaching Standoff Floating Fasteners Panel Fasteners
TR Self-Clinch is our own registered trademark, we do not however, hold any patents on the following Self-Clinch products you will see. Our main competitor in the UK is PEM. When taking enquiries, just get the PEM part numbers and we can convert.
Fastener Training Manual : 14
TR Self-Clinch How Does It Work?
Notes:
A hole is punched into the parent sheet. The Self-Clinch product is introduced to the hole in the sheet. Self-Clinch product
Sheet Metal Ideally, the base of the sheet should be supported by an anvil or similar flat surface, however this can be reversed so the product is supported by the anvil. The punch must be applied using a squeezing action and not a blow or trauma type force.
Fastener Training Manual : 15
TR Self-Clinch Range
Notes:
TR Self-Clinch Stud
TR Self-Clinch Pin
Fastener Training Manual : 16
TR Self-Clinch Range
Notes:
TR Self-Clinch Nut
TR Self-Clinch Blind Nut
Fastener Training Manual : 17
TR Self-Clinch Range
Notes:
TR Self-Clinch Flush Nut The Flush Nut is designed to be totally flush on both sides of the sheet e.g. the overall height will be less than the sheet thickness.
TR Self-Clinch Through Standoff Like the Rivet Bush Standoff, the product below was designed to replace the traditional spacer and screw assembly. Unlike the Rivet Bush Standoff, it is sold in standard lengths.
Fastener Training Manual : 18
TR Self-Clinch Range
Notes:
TR Self-Clinch Blind Standoff The Blind version of the Standoff is particularly desirable for cosmetic reasons.
TR Self-Clinch Clip-on Standoff
Fastener Training Manual : 19
TR Self-Clinch Range
Notes:
TR Self-Clinch Broaching Nut Broaching products are for use in thermosetting plastics such as PCB and very soft aluminium.
TR Self-Clinch Broaching Standoff
Fastener Training Manual : 20
TR Self-Clinch Range
Notes:
TR Self-Clinch Floating Fasteners Floating Fasteners are available in Locking and Non Locking.
TR Self-Clinch Panel Fastener
Fastener Training Manual : 21
TR Self-Clinch Range
Notes:
TR Self-Clinch Recess Panel Fastener
TR Self-Clinch Low Profile Panel Fastener
Fastener Training Manual : 22
TR Self-Clinch
Notes:
The ten most commonly asked questions about self-clinch products. • Does the shape of a self clinching product alter during installation? No, the product does not deform in any way, meaning no riveting and crimping is required. • What holds the fasteners in the sheet? The squeezing force upon the fasteners causes the sheet metal beneath the head to cold-flow into the undercut of the product, locking it in place. • Do I need special equipment to install these fasteners? No, self clinching fasteners are installed using any type of parallel acting press which will squeeze the fastener into the material. • Will these fasteners fall out, twist or spin if excess tightening occurs? No, the typical torque out values are generally quite high compared to the rotational force that will be put into them. • Can a self clinching product be installed with a simple blow of a hammer or similar force? A self clinching fastener must be installed using a squeezing action. Sudden impact does not allow enough time for the material to cold-flow. • Are there self clinching fasteners to suit stainless steel sheet material? Yes, there are many self clinch fasteners available for stainless steel applications and will be made from specially hardened stainless steel.
Fastener Training Manual : 23
TR Self-Clinch
Notes:
The ten most commonly asked questions about self-clinch products. • Are there panel requirements when using self clinching products? There are two basic requirements. Firstly, the panel must be a softer material than the fastener that is going into it. Secondly, the panel / sheet material must meet the minimum sheet thickness required by that particular fastener. • Is there a maximum sheet thickness to be aware of before specifying self clinching fasteners? Generally, there is no specified maximum sheet thickness for sheets. However, some fastener types do specify a thickness range which includes their maximum. • Some self clinching fasteners have hexagonal shaped heads. Does a hexagonal shaped hole have to be punched to install these? All self clinching products are installed into a round punched hole. • Can self clinching fasteners be installed blind, if access to the other side is limited? Generally, you must have access to both sides of the sheet to install these properly, however there are some larger nuts which can be drawn in from one side using an impact torque wrench.
Fastener Training Manual : 24
TR Self-Clinch Installation Problems and Solutions Problem Fastener not sealed squarely
Possible cause Punch and anvil faces are not parallel. Panel cocked during installation. Poor holding power Inadequate installation force. Countersunk hole in panel.
Threads tight – sheet buckles Tight threads, cracked
Fasteners over squeezed. Shank lengths extend through sheet.
Panel buckles badly with stud in .040” to .059” (1 – 1.5mm) material Poor holding power in studs or standoffs in panel Poor holding power
Lack of countersunk in anvil.
Notes:
Solution Ensure punch and anvil are flat. Ensure large panels are held perpendicular to punch. Seat fastener against shoulder by applying more force or changing shut height of press. Do not countersink or deburr hole. Reduced installation force. Choose fasteners with proper shank length for sheet thickness. Provide countersink in anvil to specified dimensions.
Hole in anvil too Use anvil with hole large or chamfered. per catalogue dimensions. Die side of Punch hole under size and ream to panel thicker .093”/2.36mm may catalogue have hole too large dimensions or for fastener. change tooling to punch from opposite side. Fastener Training Manual : 25
TR Self-Clinch Installation Problems and Solutions Problem Head of flush head stud or standoff cups Edge of panel bulges
Possible cause Punch diameter too small or not hard and flat. Mounting hole violates specified minimum edge distance. Nut is over-squeezed.
Notes:
Solution Punch must be larger than head of stud or standoff. Restrain panel or bracket in fixture during installation or move mounting hole away from edge. Reduce installation force if possible.
Fastener Training Manual : 26
