T Slot Extrusion Table
2021年7月24日Register here: http://gg.gg/vhvfj
This document covers a simple method to decide what size and shape of 80/20 t-slot bar is required for a particular project – based on the weight the structure must support. There are infinite ways of engineering a t-slot aluminum structure, but the method outlined below is simple and straightforward – and should be easy to understand by non-engineers. Although we reference 80/20 brand t-slot extrusion data in this article, you could draw usable conclusions for other t-slot aluminum profiles if their size, weight and shapes were similar to 80/20 Inc. t-slot products.
One last thing to think about when designing t-slot aluminum structures or frames with 80/20 or any other brand of aluminum extrusions is maximum load. While the cart or table or frame you are designing may only be used for holding a 50 lb. Piece of equipment, what will happen if a large person stands on it and uses it as a way to change a high. “Dyna-Lift Systems can quickly convert a fixed height table or workbench to a lift table with a 0-16 inch range of height adjustment. Adjustable lift tables/systems for industrial workbenches provide ergonomic workstations for worker safety and comfort.
The basic principle of choosing the right bar is understanding when a bar starts bending (commonly referred to as deflection) under a specific weight load.
There are 9 common methods for calculating deflection for t-slot aluminum bars as outlined below:
Today, we will be looking at the Two-End Supported method using Load Centered weight (circled in the chart above). While the two-end fixed test method is closest to the common vertical corner post method of design, it assumes an unbreakable connection with the vertical post. As fastener strength will play a role in any fixed design strength, we will use the two end supported method to better illustrate independent bar strength. In general, bars will bend easier when supported on each end versus being actually fastened between two vertical posts; consequently, the data and conclusions provided here will have a magnitude of safety if used in a two end fixed configuration.
How strong is each extrusion type or bar? We get that question all the time. As outlined above, it all depends on what you do to the bar. But in our opinion, the cleanest, simplest way to judge bar strength and deflection is to look at how far a bar will bend if we put all the weight in the middle of the bar while supporting both ends.
At F&L Industrial Solutions, we use a target defection of 1/10” or under for most t-slot structures. If a bar has a chance of bending more than 1/10”, then we usually redesign with a stronger bar. So it is important to remember that target – a tenth of one inch or under.
Look at the chart below.
Maximum Weight Loads for 36″ Long 80/20 T-Slot Aluminum Bars
As you can see, the 80/20 t-slot called 1010 (which is a 1” x 1”) bar will bend 1/10” when 46 lbs. is applied to the center of a 36” long bar, while both ends are supported. If we were building a simple table, we might say that this table could hold a maximum of 184 lbs. (4 horizontal bars forming the table top) on the edges of the table (how much the center of a tabletop could hold would be dependent on the tabletop material and thickness – a good subject for another day). That same table designed with the 2020 series (2” x 2”) could hold up to 2,304 lbs on the edges.
Note: It is important to realize that some of the weaker fastening methods can only hold 200 – 400 lbs., so using a heavy-duty fastener is imperative to achieve the same strength as the bar. For example, there would be no reason to spend money on strong 2020 bars and match them with inexpensive and fairly weak corner brackets as the fasteners would break before the bar bent 1/10”. By using stronger connectors like end fasteners and anchor fasteners and external gussets, one can easily create connections that are as strong or stronger than the bar.
Click here to read about fastener strength in a past issue of Extrusion Builder News.
The graph above is a good starting point, but it is only one data point – for 36” long bars. A longer bar would bend at a much lower weight, and a shorter bar will bend a higher weight. Usually when we are designing a t-slot aluminum structure, we will add additional supports so that there is rarely long unsupported bars. For example, if a table top was 8’ feet long – we would normally put two additional cross braces under the table top, and at least 6 vertical legs – thereby eliminating any long bar from carrying too much of the load.
One last thing to think about when designing t-slot aluminum structures or frames with 80/20 or any other brand of aluminum extrusions is maximum load. While the cart or table or frame you are designing may only be used for holding a 50 lb. piece of equipment, what will happen if a large person stands on it and uses it as a way to change a high light bulb? When designing, you should design for the very worst case scenario that you want your frame to survive.
In summary, here are the 4 simple steps to determining the t-slot aluminum bar you need for your frame:
*What is the maximum load or weight that the structure will be exposed to?
*What is the longest bar length that will be used in your design?
*Find a deflection calculator for the t-slot aluminum bars you are using. An online deflection calculator for 80/20 is here.
*Using 1/10” or under as a target, what is the proper bar type to use at the length identified in Step 2.
Still confused? F&L Industrial Solutions offers free design and quotation of high quality 80/20 t-slot aluminum extrusion framing – so don’t be afraid to contact us to help. Click here to contact us to discuss your next project.
Ready to buy – visit our online Extrusion Shop.
Or call 858-602-1500.
If you would like to download and use the 80/20 Inc. deflection calculator that we used for this article, just click here to download.
Many of the woodworking jigs and fixtures I make have at least one length of t-track built into them.
A t-slot aluminum extrusion provides an easy way to make jigs usable for different size workpieces as well as adding an adjustable clamping point for jig accessories such as stop blocks and toggle clamps.
This 1/4’ t-slot track has a groove down the middle to keep the drill bit from wandering off center when drilling mounting holes.
A t-slot extrusion can be used in other places besides jigs. Use a pair on a router table to make an adjustable fence. Or use one on the fence to hold a featherboard or two.
Use them whenever you need to clamp anything anywhere along a straight line.
The two most common t-slot sizes are 1/4’ and 5/16’. These two sizes will cover most every woodworking application. In fact, I use 1/4’ most of the time because it’s cheaper and plenty strong for what I use it for.
These t nuts and t bolts make it easy to attach clamps and other accessories to the t-track.
It is best to use t-nuts and t-bolts when attaching accessories to the track. Regular nuts and bolts can wreck the slot if overtightened.
If you have to use a regular hex bolt, use a small washer to prevent the head of the bolt from digging into the soft aluminum.
I like to get my t-bolts extra long and cut them down to the length needed for each application. This way I only need to keep one length in each size on hand. Mounting the t track
Slots online hollywoodcasino.us.org. No matter what your application, you’ll have to cut a dado with either a table saw or router to mount the track flush with it’s neighboring surface.
A 3/4’ x 3/8’ deep dado is cut to keep this t track level with the top of the workpiece. I cut this dado with the table saw.
The 1/4’ track that I use requires a dado that is 3/8’ deep and 3/4’ wide. The 5/16’ track needs a dado 7/16’ deep by 7/8’ wide. I think these are fairly standard sizes, but always measure first before cutting.
Some t-track comes with pre-drilled mounting holes, but the version I like to use requires you to drill your own holes. They do however, provide a small groove in the center to help keep the drill bit from wandering.
Drilling your own holes takes a little extra time, but allows me to place them where it’s convenient or necessary. I found with the other stuff, I was drilling extra holes where I needed them anyway. T Slot Extrusion Table Where to buy
I live in a small city of 35,000 people with only two major building supply centers. Trying to find stuff like this is maddening, so for years I’ve been ordering hard to find items online.
I get a lot of my jig parts from Lee Valley here in Canada. Look under hardware -- Jig & Fixture Parts. They have a very nice selection of top quality goodies, even if they are a bit pricey.
With the Canadian dollar hanging pretty close with the US dollar these days, I find myself hopping across the virtual border more often when I find great deals online. Online stores like Amazon carry a large assortment of t-track and related hardware. Cheap T Slot Extrusions
One of the advantages of living in a large city is selection and availability of products. For those of us that prefer to live in smaller centers, the internet has evened the playing field. We can often get things shipped to our door cheaply and quickly for the same price a guy in the city might pay for gas running around to collect the things he needs. No white knuckle driving or one finger salutes.. I love it.
Related Articles
Using t-track on a crosscut sled fence..
Using t-track on a sacrificial fence..
Table Saw Jigs
T Slot Aluminum ExtrusionsNew! CommentsHave your say about what you just read! Leave me a comment in the box below.T Slot Aluminum Extrusion Table
Register here: http://gg.gg/vhvfj
https://diarynote-jp.indered.space
This document covers a simple method to decide what size and shape of 80/20 t-slot bar is required for a particular project – based on the weight the structure must support. There are infinite ways of engineering a t-slot aluminum structure, but the method outlined below is simple and straightforward – and should be easy to understand by non-engineers. Although we reference 80/20 brand t-slot extrusion data in this article, you could draw usable conclusions for other t-slot aluminum profiles if their size, weight and shapes were similar to 80/20 Inc. t-slot products.
One last thing to think about when designing t-slot aluminum structures or frames with 80/20 or any other brand of aluminum extrusions is maximum load. While the cart or table or frame you are designing may only be used for holding a 50 lb. Piece of equipment, what will happen if a large person stands on it and uses it as a way to change a high. “Dyna-Lift Systems can quickly convert a fixed height table or workbench to a lift table with a 0-16 inch range of height adjustment. Adjustable lift tables/systems for industrial workbenches provide ergonomic workstations for worker safety and comfort.
The basic principle of choosing the right bar is understanding when a bar starts bending (commonly referred to as deflection) under a specific weight load.
There are 9 common methods for calculating deflection for t-slot aluminum bars as outlined below:
Today, we will be looking at the Two-End Supported method using Load Centered weight (circled in the chart above). While the two-end fixed test method is closest to the common vertical corner post method of design, it assumes an unbreakable connection with the vertical post. As fastener strength will play a role in any fixed design strength, we will use the two end supported method to better illustrate independent bar strength. In general, bars will bend easier when supported on each end versus being actually fastened between two vertical posts; consequently, the data and conclusions provided here will have a magnitude of safety if used in a two end fixed configuration.
How strong is each extrusion type or bar? We get that question all the time. As outlined above, it all depends on what you do to the bar. But in our opinion, the cleanest, simplest way to judge bar strength and deflection is to look at how far a bar will bend if we put all the weight in the middle of the bar while supporting both ends.
At F&L Industrial Solutions, we use a target defection of 1/10” or under for most t-slot structures. If a bar has a chance of bending more than 1/10”, then we usually redesign with a stronger bar. So it is important to remember that target – a tenth of one inch or under.
Look at the chart below.
Maximum Weight Loads for 36″ Long 80/20 T-Slot Aluminum Bars
As you can see, the 80/20 t-slot called 1010 (which is a 1” x 1”) bar will bend 1/10” when 46 lbs. is applied to the center of a 36” long bar, while both ends are supported. If we were building a simple table, we might say that this table could hold a maximum of 184 lbs. (4 horizontal bars forming the table top) on the edges of the table (how much the center of a tabletop could hold would be dependent on the tabletop material and thickness – a good subject for another day). That same table designed with the 2020 series (2” x 2”) could hold up to 2,304 lbs on the edges.
Note: It is important to realize that some of the weaker fastening methods can only hold 200 – 400 lbs., so using a heavy-duty fastener is imperative to achieve the same strength as the bar. For example, there would be no reason to spend money on strong 2020 bars and match them with inexpensive and fairly weak corner brackets as the fasteners would break before the bar bent 1/10”. By using stronger connectors like end fasteners and anchor fasteners and external gussets, one can easily create connections that are as strong or stronger than the bar.
Click here to read about fastener strength in a past issue of Extrusion Builder News.
The graph above is a good starting point, but it is only one data point – for 36” long bars. A longer bar would bend at a much lower weight, and a shorter bar will bend a higher weight. Usually when we are designing a t-slot aluminum structure, we will add additional supports so that there is rarely long unsupported bars. For example, if a table top was 8’ feet long – we would normally put two additional cross braces under the table top, and at least 6 vertical legs – thereby eliminating any long bar from carrying too much of the load.
One last thing to think about when designing t-slot aluminum structures or frames with 80/20 or any other brand of aluminum extrusions is maximum load. While the cart or table or frame you are designing may only be used for holding a 50 lb. piece of equipment, what will happen if a large person stands on it and uses it as a way to change a high light bulb? When designing, you should design for the very worst case scenario that you want your frame to survive.
In summary, here are the 4 simple steps to determining the t-slot aluminum bar you need for your frame:
*What is the maximum load or weight that the structure will be exposed to?
*What is the longest bar length that will be used in your design?
*Find a deflection calculator for the t-slot aluminum bars you are using. An online deflection calculator for 80/20 is here.
*Using 1/10” or under as a target, what is the proper bar type to use at the length identified in Step 2.
Still confused? F&L Industrial Solutions offers free design and quotation of high quality 80/20 t-slot aluminum extrusion framing – so don’t be afraid to contact us to help. Click here to contact us to discuss your next project.
Ready to buy – visit our online Extrusion Shop.
Or call 858-602-1500.
If you would like to download and use the 80/20 Inc. deflection calculator that we used for this article, just click here to download.
Many of the woodworking jigs and fixtures I make have at least one length of t-track built into them.
A t-slot aluminum extrusion provides an easy way to make jigs usable for different size workpieces as well as adding an adjustable clamping point for jig accessories such as stop blocks and toggle clamps.
This 1/4’ t-slot track has a groove down the middle to keep the drill bit from wandering off center when drilling mounting holes.
A t-slot extrusion can be used in other places besides jigs. Use a pair on a router table to make an adjustable fence. Or use one on the fence to hold a featherboard or two.
Use them whenever you need to clamp anything anywhere along a straight line.
The two most common t-slot sizes are 1/4’ and 5/16’. These two sizes will cover most every woodworking application. In fact, I use 1/4’ most of the time because it’s cheaper and plenty strong for what I use it for.
These t nuts and t bolts make it easy to attach clamps and other accessories to the t-track.
It is best to use t-nuts and t-bolts when attaching accessories to the track. Regular nuts and bolts can wreck the slot if overtightened.
If you have to use a regular hex bolt, use a small washer to prevent the head of the bolt from digging into the soft aluminum.
I like to get my t-bolts extra long and cut them down to the length needed for each application. This way I only need to keep one length in each size on hand. Mounting the t track
Slots online hollywoodcasino.us.org. No matter what your application, you’ll have to cut a dado with either a table saw or router to mount the track flush with it’s neighboring surface.
A 3/4’ x 3/8’ deep dado is cut to keep this t track level with the top of the workpiece. I cut this dado with the table saw.
The 1/4’ track that I use requires a dado that is 3/8’ deep and 3/4’ wide. The 5/16’ track needs a dado 7/16’ deep by 7/8’ wide. I think these are fairly standard sizes, but always measure first before cutting.
Some t-track comes with pre-drilled mounting holes, but the version I like to use requires you to drill your own holes. They do however, provide a small groove in the center to help keep the drill bit from wandering.
Drilling your own holes takes a little extra time, but allows me to place them where it’s convenient or necessary. I found with the other stuff, I was drilling extra holes where I needed them anyway. T Slot Extrusion Table Where to buy
I live in a small city of 35,000 people with only two major building supply centers. Trying to find stuff like this is maddening, so for years I’ve been ordering hard to find items online.
I get a lot of my jig parts from Lee Valley here in Canada. Look under hardware -- Jig & Fixture Parts. They have a very nice selection of top quality goodies, even if they are a bit pricey.
With the Canadian dollar hanging pretty close with the US dollar these days, I find myself hopping across the virtual border more often when I find great deals online. Online stores like Amazon carry a large assortment of t-track and related hardware. Cheap T Slot Extrusions
One of the advantages of living in a large city is selection and availability of products. For those of us that prefer to live in smaller centers, the internet has evened the playing field. We can often get things shipped to our door cheaply and quickly for the same price a guy in the city might pay for gas running around to collect the things he needs. No white knuckle driving or one finger salutes.. I love it.
Related Articles
Using t-track on a crosscut sled fence..
Using t-track on a sacrificial fence..
Table Saw Jigs
T Slot Aluminum ExtrusionsNew! CommentsHave your say about what you just read! Leave me a comment in the box below.T Slot Aluminum Extrusion Table
Register here: http://gg.gg/vhvfj
https://diarynote-jp.indered.space
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