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VMC Machining (Vertical Machining Centre Work)

Vajra Techno runs three-axis vertical machining in-house at Dewas, Madhya Pradesh, for castings, plates, housings and tooling components in cast iron, ductile iron, aluminium, mild steel and SS304/316. Parts are machined to customer drawings and dispatched pan-India.

What is the vertical machining envelope?

Capability is stated as envelope and specification, not equipment. The published figures are:

Send the part envelope — overall length, width, height and weight — with your drawing and you get written confirmation that it fits the cell before anything else is discussed. That is a same-day answer, and it costs you nothing to ask.

The same figures appear in tabular form on the machining capabilities page alongside horizontal machining, material tolerances and inspection equipment.

What kind of parts suit vertical machining?

Vertical machining suits parts where most of the work is on one face, or on one face plus edges. Plate work, cover plates, mounting brackets, bearing housings, end covers, pump housings and die and tooling plates all fit this pattern.

It also suits parts that need a large flat machined face relative to their height. The vertical spindle applies cutting force straight down into the table, so a wide thin part is held stable and chatter is easier to control than in a horizontal setup.

Parts needing four or more machined faces in accurate relation to each other are usually better routed to horizontal machining, where indexing replaces re-fixturing and stacked setup error is avoided.

How is work held and located?

Workholding is chosen from the drawing's datum scheme, not from convenience. Standard routes are machine vice for prismatic blanks, step jaws for repeat batches, direct table clamping with parallels for large plates, and purpose-built fixtures where a casting has no usable clamping face.

For castings, the first operation establishes a machined datum face and two locating holes. Everything after that references those. This keeps positional tolerance between features tied to one datum set instead of accumulating across setups.

Dedicated fixtures are quoted separately from piece price when a part needs one. Fixture cost, ownership and storage terms are stated on the quotation. Customer-owned fixtures are accepted and stored against your part number.

How many setups does a part need?

We plan the minimum number of setups the print allows. Every additional setup adds a repositioning error that has to be absorbed by the tolerance stack, so setups are reduced wherever the datum scheme permits it.

Where a second or third operation is unavoidable, the later operations locate on features machined in the first operation, so the error chain stays short and traceable. The operation sequence is fixed at process-planning stage and does not change between batches without a written process change.

What surface finish is achieved?

Milled face finish depends on material, tool geometry, feed and depth of cut, so it is committed against the callout on your drawing rather than published as one blanket figure. Bore finishes are assessed separately from face finishes, because the tooling route differs.

Where a print calls a finish tighter than the milled capability, the feature is routed to a finishing process and quoted accordingly. We flag such callouts at quotation rather than after the first article fails.

What batch sizes are run?

Prototype and single-piece work is accepted alongside repeat production batches. Typical batch size and lead time by part family are listed on the capabilities page. There is no blanket minimum order quantity, though single pieces carry setup cost that is not amortised across a batch, which shows in the piece price.

How is the work inspected?

Every new part is first-article inspected against every dimension on the print, with a written report supplied before batch release. In production, checks run at an agreed frequency on the features the drawing marks as critical.

Inspection equipment held in-house, and what each instrument verifies, is listed on the capabilities page. Where a print calls for a measurement outside our in-house scope, the check is routed to an external laboratory and the report supplied with the consignment.

Where is the work supplied?

From Dewas, Madhya Pradesh, pan-India by road freight. Parts are packed to survive road transit: machined faces protected, bores plugged where the print requires it, and ferrous parts given a rust-preventive coating for the transit duration.

How do I get a VMC part quoted?

Send a STEP or IGES model and a dimensioned 2D print in DWG, DXF or PDF, with material grade, batch quantity and required date, through the RFQ form or to vajratechnoinc@gmail.com.