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  • DennisO22 commented on mtairymd's instructable Wooden Marble Roller Machine2 days ago
    Wooden Marble Roller Machine

    On the rolling ball sculpture. What a fascinating thing to watch. Someone definitely had too much free time on their hands!

    Excellent instructable. I am going to make one for my grandchildren for Christmas. Their parents will go nuts trying to find 'lost' marbles!

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  • Kiridashi Kogatana Marking Knife - With a BBQ and Grinder

    Nice Instructable. Just a couple of points I hope will be helpful. The purpose of quenching is to try (in the case of an uncontrolled environment i.e DIY heat treatment) and produce a martensitic structure (a very hard but brittle atomic structure) that will be retained at room temperatures. The carbon content of the material will determine the success of this. In the case of your file, it has a high carbon content and that will require less heat than other lower carbon content steels, but as has been stated it will be VERY brittle. You could modify this brittleness by holding the knife with a pair of tongs etc and heating up the HANDLE END ONLY until it is red heat. Remove it from the heat and watch the cutting end change to a 'Straw' colour and immediately quench in oil (tempering). T...

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    Nice Instructable. Just a couple of points I hope will be helpful. The purpose of quenching is to try (in the case of an uncontrolled environment i.e DIY heat treatment) and produce a martensitic structure (a very hard but brittle atomic structure) that will be retained at room temperatures. The carbon content of the material will determine the success of this. In the case of your file, it has a high carbon content and that will require less heat than other lower carbon content steels, but as has been stated it will be VERY brittle. You could modify this brittleness by holding the knife with a pair of tongs etc and heating up the HANDLE END ONLY until it is red heat. Remove it from the heat and watch the cutting end change to a 'Straw' colour and immediately quench in oil (tempering). The thicker the oil the better. Also. Swirl the item around in the oil to hasten the quench. I see many internet videos where the operator just plunges the item into the oil. They do not realise that a gas bubble forms around the item being quenched, thereby reducing the effect of tempering. Swirling the item keeps the surface in contact with the oil.I hope this is helpful to anyone having a go at heat treatment of steels.

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  • DennisO22 commented on MauiMakes's instructable Spiral Staircase With a TON of Curves 3 months ago
    Spiral Staircase With a TON of Curves

    A very, very nice project. However. If the diameter at the top and the bottom are the same it is a 'helical' staircase. I know most people will call it a 'spiral' staircase, which is incorrect. The only place I have seen a 'spiral' staircase is in a lighthouse, where the structure tapers inwards as it rises.

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  • DennisO22 commented on lingib's instructable How to Cut & Fold Sheet Aluminium4 months ago
    How to Cut & Fold Sheet Aluminium

    Glad to be of help. My post was not intended to be a criticism of your post. Having been in the fabrication industry and teaching welder/fabricators, as well as other engineering disciplines how to make things without 'ooops' results, I hope they are useful for other readers who are not aware of possible pitfalls.By the way. Our workshop definition of a skilled person was. 'Someone who could get themselves out of trouble before the management ever reaslised they were in it'!

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  • DennisO22 commented on lingib's instructable How to Cut & Fold Sheet Aluminium4 months ago
    How to Cut & Fold Sheet Aluminium

    You need to be aware of two things.1. Not all aluminium is equal. There is 'Hot Worked' (annealed) aluminium which should be capable of being bent in either direction. Then there is 'Wrought' or hard aluminium. This may well fracture on the outside of the bend if this aligns with the direction of 'grain', which will depend on the rolling direction during manufacture 'Cold Rolling'. This is usually identified by its high surface finish. Then there are the 'alloyed' aluminium's which cannot be identified by looks alone. They use terms like 'half hard' of 'fully hard'. These would need to be annealed before bending, sometimes with unpredictable results (depending on the heat treatment methods employed).2. There should be a 'minimum' bending radius which will be determined by the material a...

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    You need to be aware of two things.1. Not all aluminium is equal. There is 'Hot Worked' (annealed) aluminium which should be capable of being bent in either direction. Then there is 'Wrought' or hard aluminium. This may well fracture on the outside of the bend if this aligns with the direction of 'grain', which will depend on the rolling direction during manufacture 'Cold Rolling'. This is usually identified by its high surface finish. Then there are the 'alloyed' aluminium's which cannot be identified by looks alone. They use terms like 'half hard' of 'fully hard'. These would need to be annealed before bending, sometimes with unpredictable results (depending on the heat treatment methods employed).2. There should be a 'minimum' bending radius which will be determined by the material and then it's thickness. 2T or 3T would be a good starting point.If you want the outside dimensions of the finished object (tray or bracket) to be accurate. Use the following formula: 2 x Pi x R x Theta (Number of deg's in the bend) Divided by 360. Assume the radius to be distance from the proposed start of the bend to a point approx 0.5T (maybe 0.4T for aluminium). T = material thickness. This will give you the length of material required for the 'Bend Only'. You can then mark out the bend/s on the flat sheet before any folding.If you are working with thicknesses of 1.6mm and greater. This should be taken into account and will help prevent disappointment if the bending outside edge suffers from surface cracking or bend failure.

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  • DennisO22 commented on geotek's instructable Folding Sandpaper for Longer Life4 months ago
    Folding Sandpaper for Longer Life

    That is a neat thing to know. Also. Before you crease the sheet. Pull the back of the sheet across a sharp edge of a piece of furniture keeping it taught. This will 'break the size' in the paper and give you a flexible sanding surface that will not crack if the sheet has to be 'bent'.

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  • DennisO22 commented on Gareth0123's instructable Sideways GrowBag Boxes.5 months ago
    Sideways GrowBag Boxes.

    That is a neat idea.

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  • All About Coin Rings! Make Your Own!

    Just seen this on a UK website.Defacing Coins of the RealmWe receive e-mails from people asking whether it is illegal to deface coins. We are never quite sure why they need to know, or what they are intending to do. We are quite sure that it is still be illegal to deface coins, particularly current ones.If you need to check on the legality, you could try contacting H.M. Treasury, or asking your local reference library, some libraries have a law library collection, otherwise you could ask a solicitor which will obviously cost money. While we are not in a authoritative position to give you a definitive answer we believe that you should be alright. The authorities quite sensibly are unlikely to prosecute anyone who damages one or two coins, but would probably get upset if someone defaced o...

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    Just seen this on a UK website.Defacing Coins of the RealmWe receive e-mails from people asking whether it is illegal to deface coins. We are never quite sure why they need to know, or what they are intending to do. We are quite sure that it is still be illegal to deface coins, particularly current ones.If you need to check on the legality, you could try contacting H.M. Treasury, or asking your local reference library, some libraries have a law library collection, otherwise you could ask a solicitor which will obviously cost money. While we are not in a authoritative position to give you a definitive answer we believe that you should be alright. The authorities quite sensibly are unlikely to prosecute anyone who damages one or two coins, but would probably get upset if someone defaced or printed an advertising slogan on several million of them. Similarly if your advert encouraged millions of others to do the same, you might have a problem.The lack of response from the Royal Mint probably can probably be taken to indicate their lack of concern, and if you did find yourself facing legal action later, it would certainly be a mitigating factor, if not a defence, to be able to show that you had taken the precaution of asking the mint. Taking this logic a little further, you can probably understand the difficulty for the mint in answering your question. Assuming it is illegal to deface a coin, and also assuming that the Royal Mint are not concerned about you defacing a single coin, they can hardly write to tell you they have no objection, as they would not be allowed to give you permission to break the law.

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  • All About Coin Rings! Make Your Own!

    I am pretty sure it is a criminal offence to deface a 'coin of the realm'!

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  • DennisO22 commented on Mickleblade's instructable Making a Wooden Bowgrip8 months ago
    Making a Wooden Bowgrip

    From one archer to another. That is a very nice piece of work. Recurve bow grips are very personal things. You can buy an expensive one and may still have to modify it to suit 'your' hand position. (I know that from experience)!

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  • DennisO22 commented on dpmakestuff's instructable Make It - Adjustable Router Fence9 months ago
    Make It - Adjustable Router Fence

    "Start with a clean shop. A clean shop is a happy shop"A dirty workshop is a DANGEROUS workshop!

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  • DennisO22 commented on TheWaterDog's instructable Drilling Holes in Glass Bottles9 months ago
    Drilling Holes in Glass Bottles

    In more ways than one!

    In more ways than one!

    My dad had a hardware store. I learned to drill glass and mirrors while I was still at school. The secret is SLOW drilling and NO Pressure. We used to do it with a carpenters hand brace and masonry drill bits. We never had to make a 'dam'. But we used to cover the intended drill area with some masking tape to prevent the drill from 'skidding' before the bit made its initial indentation.

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  • DennisO22 commented on Berkana's instructable Insulated Sous Vide Kit10 months ago
    Insulated Sous Vide Kit

    Hello. I purchased mine through eBay. The slow cooker/crock pot does not need a circulator, as it heats the whole base evenly.

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  • DennisO22 commented on Berkana's instructable Insulated Sous Vide Kit10 months ago
    Insulated Sous Vide Kit

    I made one using a slow cooker (crock pot) and an accurate temperature controller from China. Cost of the temperature controller, less that £10.00 UK. I see the cost of the Anova is £169.00!

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  • DennisO22 commented on Barry Neeson's instructable Duct tape spinner fidget toy10 months ago
    Duct tape spinner fidget toy

    Just one thing to be careful of. Do not put your finger through the bearing centre. If the bearing seizes during spinning your finger could be SERIOUSLY damaged. This is not a criticism, just a bit of advice.

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  • DennisO22 commented on Adam Gabbert's instructable 90° Magnetic Hand Saw Guide10 months ago
    90° Magnetic Hand Saw Guide

    Now. That is a great idea.

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  • DennisO22 commented on In The Kitchen With Matt's instructable How to Make Rolos - Easy!10 months ago
    How to Make Rolos - Easy!

    I wonder how many 'New Year Resolutions' you are going to destroy with this?

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  • DennisO22 commented on johnzhu's instructable $2 Pop Up Woodworking Bench Dogs10 months ago
  • How to Weave a Small Table Mat With Home Made Loom

    Actually my description could have been better. The finished circular mat is really more of a 'spiral' than a circle. But I hope it helps you make the circular ones.

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  • How to Weave a Small Table Mat With Home Made Loom

    We use to make mats like this when I was at junior school nearly 70 years ago. We did not need to make a frame as we made circular ones.

    We used to make mats like this using raffia and string when I was at junior school nearly 70 years ago.

    I don't have any pictures. But. The construction starts by winding a couple of turns of raffia around the end of the string. This end is the folded to form a very small circle but with the covered end laid alongside and inside the the forming circle. Then a couple of turns of raffia are made around both sections of string to hold them together using a large needle (sack needle). A couple more turns of raffia are made around the INNER next section of string only. Then a couple of turns of raffia are made around both pieces of string to hold that section together. This sequence continues until you have the round mat of your choice. A good example to look at are the 'woven style' baskets yo often see in Arabic countries.

    We use to make mats like this when I was at junior school nearly 70 years ago using rafia and string. We did not need to make a frame as we made circular ones.

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  • DennisO22 commented on Pask Makes's instructable Homemade Bar Clamps1 year ago
    Homemade Bar Clamps

    A nice use for the piece of old railway line.

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  • DennisO22 completed the lesson Welcome to Bread in the class Bread Class1 year ago
  • How to Build a Premium Sous Vide Cooker

    It is easy to do. Buy a cheap temperature sensor/controller on eBay and place it between the power socket and the crock pot. Set the crock pot to 'high' and let the sensor control the temperature.

    That is the one I used. I also made a 'Bread Proofer' out of a seed propagator and a fish tank heater using one.

    I made a sous vide cooker using a crock pot (slow cooker) and a cheap temperature controller (£10.00) from china. No need o go to all the trouble of making wiring circuits etc. It works brilliantly. I have been using it for 2 years.

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  • How to Hack a point and shoot camera and give it DSLR features

    Will this hack work with a Fuji compact camera?

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  • DennisO22 commented on Jody Franken's instructable Bamboo fishing tackle box1 year ago
    Bamboo fishing tackle box

    Nice looking box. But how much does it weigh? It looks quite a load to carry any distance.

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