Search found 122 matches

by Bentworker
Mon Dec 02, 2019 2:49 pm
Forum: General Discussion
Topic: What is this thing? Some sort of hand cranked mini rotary saw?
Replies: 2
Views: 306

What is this thing? Some sort of hand cranked mini rotary saw?

8E10B005-2F06-4933-AC7C-3BE5FBC808A4.jpeg
Anyone know what this thing is used for? No markings on it whatsoever. Came from the estate of someone who tinkered with clocks and watches.
by Bentworker
Tue Nov 26, 2019 7:02 pm
Forum: General Discussion
Topic: Interrupted Cut Removes Tool Point
Replies: 27
Views: 1100

Re: Interrupted Cut Removes Tool Point

What kind of radius are you running on your tool?
by Bentworker
Tue Sep 17, 2019 9:42 pm
Forum: General Discussion
Topic: Finger Brake: Useful Tool or Waste of Money?
Replies: 63
Views: 12838

Re: Finger Brake: Useful Tool or Waste of Money?

That turned out nice. I always thought it would be neat to make a set of adjustable (acme thread) positive stroke stops for each side to make one of those little press brakes more like a real press brake. With stops you could have bend repeatability, and with different height stops on each side you ...
by Bentworker
Thu Sep 05, 2019 11:48 am
Forum: General Discussion
Topic: Splicing Romex?
Replies: 40
Views: 8584

Re: Splicing Romex?

There are plenty of ways to go about it. As long as you don't exceed box fill, use good technique and quality wire nuts (I like 3M brand) you should be good to go. Personally I find any of the "code check" flip books by Taunton press to be the best basic reference for code compliance. Code Check Ele...
by Bentworker
Fri Jul 05, 2019 11:32 am
Forum: General Discussion
Topic: Horrors of Buffer Safety
Replies: 43
Views: 9698

Re: Horrors of Buffer Safety

For what it is worth Baldor makes and sells a lot of buffers - and in their instructions they indicate "The buffer must be securely bolted to a rigid mounting surface. If a pedestal is used, first bolt pedestal securely to floor and then bolt buffer to pedestal." https://www.baldor.com/shared/manual...
by Bentworker
Fri Jul 05, 2019 9:44 am
Forum: General Discussion
Topic: Horrors of Buffer Safety
Replies: 43
Views: 9698

Re: Horrors of Buffer Safety

Did you decide to bolt the buffer down?
by Bentworker
Wed Jul 03, 2019 10:43 am
Forum: General Discussion
Topic: Horrors of Buffer Safety
Replies: 43
Views: 9698

Re: Horrors of Buffer Safety

The whole idea behind bolting it down might not be for the reasons you are contemplating. I witnessed a round motorcycle headlight trim being buffed, and the way it was being held allowed the inner rolled lip of the ring to catch on the buffer, which in a split second pulled the ring over the wheel ...
by Bentworker
Sat Jun 22, 2019 10:17 am
Forum: General Discussion
Topic: Water cooling a 12HP air cooled motor
Replies: 44
Views: 9373

Re: Water cooling a 12HP air cooled motor

You may not want to directly cool the motor with water for simplicity, and because a leak could be pretty catastrophic On large hydroelectric generators the housing where the stator and rotor are is sealed, and inside there are large air to water heat exchangers that the air is drawn through as it c...
by Bentworker
Tue Jun 11, 2019 11:38 pm
Forum: General Discussion
Topic: Large motors and soft start
Replies: 30
Views: 4738

Re: Large motors and soft start

There are other ways of reduced winding voltage starting. Might be worth buying a motor control book and taking to your local motor rewind shop for other economical ideas.
by Bentworker
Sun Jun 09, 2019 4:31 pm
Forum: General Discussion
Topic: Large motors and soft start
Replies: 30
Views: 4738

Re: Large motors and soft start

Do you get billed for Kvar hours? FYI- out west small commercial where I am are paying $.60/kVar hour.....compared to about $.14 kWH. On the subject of fuses... The utility picks a primary fuse based on the size of the transformer. The transformer has a damage curve, it can be a little overloaded fo...
by Bentworker
Sun Jun 09, 2019 3:37 pm
Forum: General Discussion
Topic: Large motors and soft start
Replies: 30
Views: 4738

Re: Large motors and soft start

I'm on the Wye-Delta bandwagon. Probably the most cost effective. Might even be able to cobble one together with used parts. If blowing the utility owned fuses on the high side of the transformer still worries you… You may be able to make out the nameplate information of the transformers that serve ...
by Bentworker
Sun Jun 09, 2019 9:52 am
Forum: General Discussion
Topic: Large motors and soft start
Replies: 30
Views: 4738

Re: Large motors and soft start

Harold-
For clarification which type of starter do you have now?

Direct on line or Star-Delta?

I couldn’t make out what your current configuration is from your last post.