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hob

Hobbing is a machining process for gear cutting, cutting splines, and cutting sprockets on a hobbing machine, which is a special type of milling machine. The teeth or splines of the gear are progressively cut into the material (a flat, cylindrical piece of metal) by a series of cuts made by a cutting tool called a hob. Compared to other gear forming processes it is relatively inexpensive but still quite accurate, thus it is used for a broad range of parts and quantities.It is the most widely used gear cutting process for creating spur and helical gears and more gears are cut by hobbing than any other process as it is relatively quick and inexpensive.A type of skiving that is analogous to the hobbing of external gears can be applied to the cutting of internal gears, which are skived with a rotary cutter (rather than shaped or broached).

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  1. A

    CP12 Gas Safe Cert & Lodger & Hob Ventilation Requirements

    Hi everyone I would be grateful for some advice from someone with Gas Safe Certification please I have a kitchen around 7m square (so above the 5m rule but below the 10m rule) I have a modern condensing boiler room sealed. I have a gas hob with mechanical extractor hood above with extractor...
  2. H

    came across this scary Gas hob to day

    call form kitchen fitter to blank gas supply to hob never seen one like this
  3. A

    Flexible Connection to Hob

    I have often read that you cannot connect a hob with a flexible connection under Gas Safe rules and regs. I was also told this by my gas fitter. Just in case you are not aware there is now a way, albeit a "semi-rigid" pipe, but to all intense and purposes it is a flexible. See Screwfix part...
  4. Y

    Orange Gas Hob Flame - Only in Mornings!

    Hi All I was wondering if one you clever people can please help me out. IOver the last week I noticed orange flame in the gas hob. The gas hob is Bosch and less than a year old. I cleaned up everything. It still continued to be orange. When I used the hob later in the afternoon and evening...
  5. T

    Gas certificate for gas hob

    Hi this is my first time on forum, Hello to all expertise, I recently became a Gas Safe registered engineer, but there is a lot to learn in a job field. I am currently doing gas certificate for a customer, I manage to do Gas rate boiler, taking flue performance analysis co/co2 ratio which...
  6. G

    Shut off valve for lpg hob requirement

    Hi I am considering renting out my house in Scotland and have an lpg hob in the kitchen. I am aware I need a gas safety certificate and a mate who was an approved gas safe plumber (now retired) has had a quick look and thinks I may need a shut off valve installed under the hob, I have every...
  7. B

    Fitter refusing to connect gas hob as gas meter is too close to electric

    The title says it all really. I had a new replacement gas hob and boiler fitted to an existing installation by a local Gas Safe engineer. However the hob failed (ignition circuitry malfunctioned) and whirlpool who manufactured it arranged to warranty replace the whole thing (there were loads...
  8. KingDoey

    Hob connected by builder...

    Fitted boiler at job last year. Customer rang as meter had been moved and wanted to be reconnected. Hob had been fitted a few months ago by her 'handyman/builder' Hope your all having a fantastic week!
  9. A

    Gas hob fsd

    Hi guys when coming across a gas hob with no flame failure device in a rented house, how should it be catorgerised now that ncs is extinct. Thanks in advance.
  10. Chalked

    Gas hob connection

    Just came across these on Williams site. are these ok for a job, as it's not a solid piped connection?
  11. S

    Smev caravan hob

    Evening folk, Hopefully we're planning on going away tomorrow for the first this year in our tourer, lunar zenith 5 berth. We've just gave her a massive inside and outside clean... 3 hours. The wife has noticed rings are not working on the hob, looks like thermocouple has...
  12. I

    Is the install of my Gas Hob safe?

    Hello, I am looking to rent out my house and it has recently obtained a gas safety certificate last month for the combi boiler and gas cooker hob appliances. The estate agents have said 2 other gas engineers since then have deemed my gas hob installation unsafe for the following reasons...
  13. jaydebruyne

    Hob Install

    Do you guys silicone the edges of hobs, the underside edge? If so, normal silicone or heat resistant? Or do you use something else or nothing at all?
  14. B

    Swap LPG cooker hob jets for Ng ones??

    Hello all, I've got roughly 80 Ng jets for gas hobs that I've installed. There'll never be piped gas here so was wondering if anybody in a natural gas area who'll never need LPG jets is interested in swapping? I'm not looking for exact same number back just whatever you have. Pm me if interested...
  15. B

    Rental Property - Replacement Gas Hob

    Hi I have now registered and I am posting this query as a member. We have a gas hob in a rental property which was fitted prior to the current regulations regarding cabinets / extractors around / above the hob. This means that the Landlord's Gas Certificate has an advisory that the...
  16. B

    Rental Property - Replacement Gas Hob

    Hi We have a gas hob in a rental property which was fitted prior to the current regulations regarding cabinets / extractors around / above the hob. This means that the Landlord's Gas Certificate has an advisory that the installation is not to current regulations. The ignition on the hob...
  17. spanner

    inset gas hob safety cert acceptance

    If you were to buy a new inset gas hob with the burners and found that the safety devices were Not implicated eg: turn on the gas hob and gas doesn't shut down. Well personally it's highly dangerous. My question is. Would this be acceptable.? Or what standard is categorically suitable??w
  18. spanner

    inset gas hob safety cert acceptance

    If you were to buy a new inset g hob with the burners and found that the safety devices were Not implicated eg: turn on the gas hob and gas doesn't shut down. Well personally it's highly dangerous. My question is. Would this be acceptable.? Or what standard is categorically suitable??w
  19. spanner

    inset gas hob safety cert acceptance

    If you were to buy a new inset g hob with the burners and found that the safety devices were Not implicated eg: turn on the gas hob and gas doesn't shut down. Well personally it's highly dangerous. My question is. Would this be acceptable.? Or what standard is categorically suitable??w
  20. T

    boiler and gas hob

    I moved into my current home 4 months ago and it has an old boiler fitted, a Myson and I will be having a new boiler fitted after Christmas but I noticed yesterday for the first time that when the boiler cuts in the hob flame drops down and then recovers. Should they not be on different...
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