DB-DIV-HEAD-01

Universal dividing head with manual drive

Name: Universal dividing head with manual drive
Brand: Dongben Workholding
SKU: DB-DIV-HEAD-01
Availability: InStock

Index the part by angle, not by eye: 1:40 worm, ±30 arc-seconds.

1:40 wormMT3 / MT4Dividing plates±30 arc-sec

A universal dividing head for milling, drilling and grinding operations where the part needs an accurate angular step: splined shafts, gear blanks, polygons, flutes, holes on a pitch circle and slots at equal spacing.

The 1:40 worm pair gives 9° of spindle rotation per turn of the handle, and the supplied dividing plates extend that to any division you need in the usual series, including the prime-number divisions that a rotary encoder table cannot hit exactly.

Technical data

Worm ratio	1:40 — one spindle turn per 40 handle turns
Spindle taper	MT3 or MT4, depending on size
Faceplate diameter	100, 125, 160, 200 mm
Indexing accuracy	±30 arc-seconds; spindle runout ≤0.005 mm
Dividing plates	Set of direct and indirect plates included
Body	Cast iron, ground seating faces, hardened steel worm pair
Supplied with	Tailstock, swivel base, change jaws, handle, keys
Options	Additional plates, chuck adaptor, vertical/horizontal changeover

How it is built

Angular accuracy that can be inspected

Indexing accuracy is measured on a dividing table and stated on the certificate. You can verify it with a sine bar and a dial gauge, which is not true of a bolted-on rotary table.

Prime-number divisions

The plate set covers divisions that a 360° encoder table cannot reach exactly, which matters for gear and spline work.

Set up vertically or horizontally

The swivel base allows both orientations without a second fixture, so one purchase covers face work and cylindrical work.

Indicative price

100–125 mm faceplateUSD 900 – 1,900

160 mm faceplateUSD 1,900 – 3,200

200 mm with tailstock and plate setUSD 3,200 – 4,800

Product code: DB-DIV-HEAD-01
Minimum order: 1 set
Lead time: 4–6 weeks

FOB Liuzhou, indicative for standard configurations. A drawing moves the number inside the band.

Ask a question about this part

Questions

What is the difference between a dividing head and a rotary table?

A dividing head indexes the part between cuts and is rigid in the cut; a rotary table interpolates continuous rotation but is less stiff and less accurate at a static angle. For gear and spline work, the dividing head wins.

How do I calculate the handle turns for a division?

Handle turns = 40 / N, where N is the number of divisions. For N = 9 that is 4 4/9 turns, which you set with the sector arms on the plate. We supply a printed division chart for every plate in the crate.

Can it be motorised later?

Yes. The handle shaft can take a stepper drive with a coupling, and we can supply the adapter plate if you tell us the motor frame at the time of order.

Does it come with a chuck?

Not by default. The spindle takes a chuck or a faceplate via the taper and the backplate thread; we quote a matched 3-jaw or 4-jaw on request.