dividing head vs rotary table made in china

Depending on what you need to index and how often, a lot of numbers can be done easily on a rotary table (anything that"s a factor of 360 is really easy), which I find convenient for things like drilling holes on a PCD so use for all sorts of jobs. It is worth looking at the gear ratios of dividing heads and of rotary tables - I didn"t and have ended up with a table with an odd ratio and an odd minor increment on the vernier scale (I think it"s 25s seconds so even getting whole minutes is impossible).

A lot of rotary tables can easily be converted to do dividing by modifying or replacing the handle with dividing plates and an indicator arm, so if it"s something you might need occasionally and not to start with, it might be worth starting with a rotary table and converting it later as required. It is also possible to use something with the right number of holes (or indentations like a gear) on the spindle with the item to be machined and index from that by making a detent to fit the holes/teeth. For example, if one needed to make a 127 tooth gear for metric threading on a SB 9" because such a thing were not available where they live, but it was possible to get a 127 tooth gear to fit some completely different application (different DP or pressure angle, possibly a module gear rather than a DP gear) then that could be attached to the same shaft as the gear blank to be machined and used to index the blank for each cut. You don"t even need the worm drive of the rotary table for that, just some thing to lock the shaft in each postion.

Some dividing heads (universal) have advanced functionality beyond indexing using plates, they can be fitted with a compound gear train to acheive numbers beyond the scope of the plates, or to connect to a feed (on a milling machine generally) which enables cutting of spirals (i.e. cams).

I am not sure if 15:1 is a useful ratio for a dividing head, it"s too coarse for a rotary table at 24 degrees per rotation (72:1 is more normal, 5 deg per rotation, I think mine is 90:1) but that"s not necessarily such an issue for a dividing head. I would say if you have the parts it"s a nice project. 6304 bearings are not hard to find - I use them for some of my kite buggy wheels, I think they are about £6 each in stainless, fortunately I don"t need those wheels for the Euros next week because all 6 bearings seem to be seized, I will need 6 off 6004"s for the wheels I will be using though - none are seized but they aren"t feeling very smooth, probably got some sand in!

I"m not sure if I really answered your question, for occasional use you can get away with a rotary table as a dividing device, possibly vice verse although most dividing heads are not as easy to use in both horizontal and vertical orientations as most rotary tables (exceptions on both sides!), but if you are looking for something to do with the worm drive you have I reckon it would probably suit a dividing head better. I"ll try andremember to look in my dividing book later and see what ratios are commonly used - unless you can find the same info on the internet sooner

You can get a set of plates for your rotary table that allow you to index positions, and you put them on the handle.. so its geared down 40:1 or 90:1, And the plates have all kinds of prime numbers all over em, so you can basicly do a billion diffrent divisions. Usally something like 1~100 devisions and lots of non prime numbers after that. "Devider arms" make finding the next hole in the seqence much easyer and efficent.

Buy a horzontal/vertical rotary table, And buy one of the better brands. .some of those cheap ones are pertty crappy. I got a phase II and it looks very impressive and seems well built with nice features.

You don"t need an angle table yet either. First off, usally you can just mount the part on an angle in the vise, or tilt the head, clamp it down on an angled part, whatever.

PS: No rotary table will be doing spirals unless its linked to the X or Y axis of your mill (or has its own X or Y axis). Some have a large geartrain option to facilitate this.. but how often do you really need to make spirals? And linking it up isent exactly easy. since you"ll need to mount a geartrain to your mill and likey some shafts and such.

A great tip for any of you that have a Grizzly G0516 three-in-one machine or the little Grizzly G8689 mini mill. I guess it would work on a HF mini mill also. I know that there are several others that are the same machine. I have always disliked the lack of distance between the spindle and the table of my G8689 mini mill. I can call mine the mini mill now because I bought the standalone base and table and separated it from the G0516 three in one machine. This gave me a bigger table and made the machine much more easier to operate. Then I bought a rotary table for the mill and soon found that the spindle to table distance was lacking big time, especially when using a 3 or 4 jaw chuck on the RT.

Last week I was trying to drill piece that I had chucked up in the RT and lacked sufficient space for the drill bit. I removed the “upward stop for the Z axis thinking I could gain some more travel only to find I ran out of rack that lifts the mill head. After looking for a solution I decided if I could get another piece of the rack and add it above present rack, I could gain about 2 or 3 inches of Z-axis range.

The way that I was taught is that you have to make up a test bar. Take a piece of 12" by 1" roundbar, drill two centre holes in it"s ends, on your lathe and take a parallel cut between centres. Once you have corrected the error of your lathe and both ends of the test bar measure the same diameter, you can then use the test bar in your milling machine as well, to set the tailstock of the dividing head as well as the alignment of the bar to the table axis.

Depending on the size of rotary working tables, you can find the office rotary table that is suitable for your customers. They have long steel rotary table and work heavy in conjunction with the office rotary table.

There are also torsion rotary tables, such as 3D rotary tables, and evenD rotary tables. These working tables can be used in manufacturing, construction, and home office working tables for people of all ages.

A rotary table is also called a rotary table, it is designed to cut heavy-duty steel, making it a larger product. The advantage of a circular table is that it is possible to cut large objects in a variety of ways, depending on the size and shape of the material it is made of, heavy-duty steel, making it a larger product. The circular table usually is in size but it can also be used to cut laminated or in-ior on heavy-duty steel, making it a larger product.

A rotary table, also known as a rotary table, is a toolbench that is heavy with work equipment, allowing users to cut or grind heavy work equipment on the surface. A rotary table is a wheelbench designed for users to sit or lay on heavy work equipment, allowing users to cut hard or unurfaced work. It is a portable table designed to for heavy work and allowing users to cut large or up holes in the workbench.

I have just bought a Tom Senior Mill and was after some dividing head advice for a Light Vertical with S type head: I quite fancy getting a dividing head and a few questions come to mind:

As it seems you have a good height from spindle to table I believe a BS0 Dividing head will suit your machine and provide a good range of divisions and working angles.

As it seems you have a good height from spindle to table I believe a BS0 Dividing head will suit your machine and provide a good range of divisions and working angles.

Having said that I have done a number of jobs where I thought a dividing head which could be mounted horizontally or vertically would be a good thing. Then I bought a 6 inch (being the diameter of the rotating platen) rotary table and all was well in the world.

I also have a 10inch diameter rotary table; this is too big for this little mill as it"s too easy to not be able to reach the centre of the table with the limited y axis travel.

Why recommend a rotary table that can only be used vertically or horizintally when a BSO Dividing Head will do both and any angle from -1 to +90 degrees.

I have the same mill. I bought a 8" indexing rotary table , with the 8" 3 jaw chuck. It was way too big for the mill table. I have since sold that & bought a 6" Vertex style & it"s just the right size for the Senior. No indexing plates though. Not something i think i may ever need. Oh what have i said. Never say never.

Although a rotary table can only easily be mounted flat or at 90 deg they do tend to be a lot lower when used flat than a dividing head when it is set vertically. Add onto that something to screw onto the nose so you can hold work like a chuck and that is the height to be considering not so much when it is set a zero.

So first best to decide what you are going to be wanting to divide, if it"s a lot of gear cutting and radial holes then the dividing head is probably best. If it"s a lot of axial holes such as bolt PCD are machining curved parts then a rotary table may be the better option.

Although a rotary table can only easily be mounted flat or at 90 deg they do tend to be a lot lower when used flat than a dividing head when it is set vertically. Add onto that something to screw onto the nose so you can hold work like a chuck and that is the height to be considering not so much when it is set a zero.

So first best to decide what you are going to be wanting to divide, if it"s a lot of gear cutting and radial holes then the dividing head is probably best. If it"s a lot of axial holes such as bolt PCD are machining curved parts then a rotary table may be the better option.

Shame there is no one mentioning the exact height of a BSO with chuck when used in a vertical position. Even though it comes with indexing plates, it is still only a dividing head and cannot rotate at any angle. I have 3 dividing plates and there are many missing positions. When I wanted 118 divisions, there was no way with the plates to get that. I would like one for its strong locking tilt, but only in addition to already having the RT, which holds a 5" three jaw scroll and also a 6" 4 jaw independent.

Simple enough to make one, index 20 on a 59 hole plate. Here"s one I made for 63 and 69 divisions, as I was too idle to set up for differential dividing:

The ideal set up would be a dividing head and a horizontal/vertical rotary table. As discussed by JasonB they have different strengths and weaknesses.

Immediately beneath the photo in thelink below, there"s some text that says "BS0 Dividing Head Manual", which is a link to a pdf (although it doesn"t look like one)

Difficult to give an exact height when a div head is vertical with chuck as it will depend somewhat on the size of chuck being used and a threaded body one will result in a lower overall height than one on a threaded backplate.

I have the 3 dividing plates for the 6" RT"s but lacking the 59 hole and for one probably never to be repeated scale (3mm pitch leadscrew on an imperial lathe cross slide, hence the 118 divisions) it would not be worth it. And how could you make one if you only had a dividing head?

As for the term "hinge", I made that up. The one I am thinking of is still called a rotary table; there are two parts ... the rotary table, and then the base. The two are connected on one side by the hinges (just two tabs with holes, a rod, and the horizontal hole in the base that the rod goes through). The tab parts fit over the edges of the base and the rod slides through the tab holes and the horizontal hole in the base.

Even with a rotary table that is not hinged, you can mount it vertically and in that position you might call it a dividing head because you can usually buy a tailstock for it, and, for certain ones the dividing plates.

The indexing head doesn"t only look great, but allow you to do more with your milling machine: measuring specific angles and dividing a circle into equidistant arcs. It comes with 3 interchangeable indexing plates and a tailstock to ensure more precise and stable work. It will be your perfect assistant to machine the flutes of a milling cutter, cut the teeth of a gear, mill curved slots, or drill a bolt hole circle around the circumference of a part.

The indexing head features a long service life due to its rigid quality. It is designed with a mirror finish that resists wear and tear and looks low-profile.

The dividing head is enabled to tilt from 10° below horizontal to 90° vertical. And that will be convenient if you want to cut the part from a certain angle.

The high precision performance of the indexing head is achieved with indirect indexing plates A, B, and C. All divisions 2-50 can be done, but some from 51 to 380 cannot be obtained. Check the manual before setting.

Compact precision CNC rotary table, suitable for single part or small batch production in precision engineering. A horizontal or vertical assembly is possible. You can not buy a better quality!

It is suitable as 4th axis on engraving and milling machines for engraving, lasering, drilling, grooving, milling or for use on a tool or surface grinding machine. Square, hexagonal, gear milling of any pitch or 3D machining is possible.

Compact precision CNC rotary table, suitable for single part or small batch production in precision engineering. A horizontal or vertical assembly is possible. You can not buy a better quality!

It is suitable as 4th axis on engraving and milling machines for engraving, lasering, drilling, grooving, milling or for use on a tool or surface grinding machine. Square, hexagonal, gear milling of any pitch or 3D machining is possible.

Dividing head, dividing head, tool holder for grinding, drill grinding machine, milling cutter grinding machine, drill grinding holder, milling cutter holder

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