Chelsea Clock: October 2012

Sunday, 21 October 2012

Pratt Burnerd Chuck

George Cohen, Sons and Company was a scrap metal merchant with offices in Commercial Road, London. The company was founded by George Henry Cohen (1828–1890)[1] as Messrs. George Cohen & Co. in 1834and changed its name to George Cohen, Sons and Co. in 1883 on the appointment of Michael Cohen, son of the founder.After the First World War the company won a number of large contracts to dispose of surplus munitions including "400,000 tons of high explosives and other shells". The company also engaged in demolition work, with projects including the towers of Crystal Palace, which had survived the great fire, the Dome of Discovery and Skylon at the Festival of Britain, and London's tram system. In 1940 the company moved its head offices to Hammersmith.

Pratt Burnerd Chuck

Wednesday, 17 October 2012

90 degree drill

90 Degree Drill

Funny, I bought this product because it looked and felt stronger & better quality than the Milescraft 1390, which had bad reviews. I did my homework online and the Milwaukee 49-22-8510 seemed like the best option out there in my price range, with a pretty high torque rating. As I was using a hole saw to drill through 4" thick glue-lam beams, torque and a certain amount of mechanical durability was a must. Problem: I couldn't find a way to get the Milwaukee right angle thingie in time.

So I went to my local True Value and asked if they had anything up to the job. They suggested this Easypower thing. It felt hefty in my hand, no play in the gears, smooth & quiet, all metal. Small enough to fit where I needed it to.

It served well. Since it has no side handle like the Milwaukee (actually the Milescraft has that too, but looks way too bulky), you do need to get used to the odd shift in torque direction, but the faintly knurled grip was easy to hang onto. (a deeper knurl would be a nice improvement to this tool)

90 Degree Drill

Wednesday, 10 October 2012

drill chuck key

Drill Chuck Key

Some chucks, such as magnetic chucks and vacuum chucks, are of a different sort from the radially symmetrical mechanical clamps mentioned above. Instead, they may be surfaces (typically flat) against which workpieces or tools are firmly held by magnetic or vacuum force.

To chuck a tool or workpiece is to hold it with a chuck, in which case it has been chucked. Machining work whose workholding involves a chuck is often called chucking work. Automatic lathes that specialize in chucking work are often called chuckers.

Drill Chuck Key

rohm chucks

Chucks

A chuck is a specialized type of clamp used to hold an object,[1] usually an object with radial symmetry, especially a cylindrical object. It is most commonly used to hold a rotating tool (such as the drill bit in a power tool) or a rotating workpiece (such as the bar or blank in the headstock spindle of a lathe). Some chucks can also hold irregularly shaped objects (ones that lack radial symmetry). In some applications, the tool or workpiece being held by the chuck remains stationary while another tool or workpiece rotates (for example, a drill bit in the tailstock spindle of a lathe, or a round workpiece being milled by a milling cutter).

Chucks

chuck jaws

Chucks Jaw

hr2450

Hr2450

The Catalog of High Angular Resolution Measurements (CHARM) includesmost of the measurements obtained by the techniques of lunaroccultations and long-baseline interferometry at visual and infraredwavelengths, which have appeared in the literature or have otherwisebeen made public until mid-2001. A total of 2432 measurements of 1625sources are included, along with extensive auxiliary information. Inparticular, visual and infrared photometry is included for almost allthe sources. This has been partly extracted from currently availablecatalogs, and partly obtained specifically for CHARM. The main aim is toprovide a compilation of sources which could be used as calibrators orfor science verification purposes by the new generation of largeground-based facilities such as the ESO Very Large Interferometer andthe Keck Interferometer. The Catalog is available in electronic form atthe CDS via anonymous ftp to cdsarc.u-strasbg

Hr2450

jacobs chucks

Jacobs Chucks