Horizontal Boring Machine
In-line boring across long, heavy fabricated bodies.
800mmMax bore dia.
15TTable capacity
Ambattur Industrial Estate · Chennai · Est. 1993
Machining held to tolerance, on components others won't touch.
Horizontal boring, CNC boring, plano milling and radial drilling on customer-supplied fabricated structures up to 15 tons. When downtime is expensive, Rajamma delivers.
0yrs
In heavy machining
0T
Max component weight
0hr
Emergency job support
0+
Years machining heavy components for India's industrial sector
Who we are
A machining partner, not a fabricator.
Founded in 1993 in Ambattur Industrial Estate, Rajamma Engineering does one thing: precision machining of heavy, customer-supplied fabricated structures. We don't fabricate — three decades of machining only means every hour of investment has gone into boring, milling and drilling accuracy on components other shops turn away.
- Machining only — no fabrication conflicts of interest
- Components up to 15 tons on a single setup
- Emergency job support when a breakdown can't wait
Core capabilities
Eight machining disciplines. One standard of accuracy.
Horizontal Boring
True, in-line bores across large fabricated bodies and machine bases.
up to 800mm boreCNC Boring
Programmable multi-axis boring for repeatable tolerance across batches.
0.02mmPlano Milling
Wide-bed flat and profile milling on large fabricated plates and beds.
4m bed lengthRadial Drilling
Heavy-duty drilling and tapping across large, awkward-to-fixture parts.
up to 80mm dia.Precision Milling
Fine-tolerance face and profile milling for critical mating surfaces.
1.6 µmAlignment Machining
Multi-datum alignment across large structures machined in one reference.
0.05mmMachine Base Machining
Structural bases and beds machined true for OEM machine builders.
up to 15TEmergency Job Support
Priority slotting for breakdown-critical machining when the plant is down.
24hr responseMachine fleet
Built for scale most shops can't fixture.
A closer look at the machines behind every quoted tolerance — full specifications and working envelopes on each machine page.
Plano Miller
Wide-bed flat and profile milling for large plates and bases.
4000mmBed length
1200mmBed width
CNC Boring Machine
Programmable multi-axis boring for repeatable batch tolerance.
0.02mmRepeatability
4-axisControl
Radial Drilling Machine
Heavy-duty drilling and tapping on large, awkward fixtures.
80mmMax drill dia.
2000mmArm radius
Industries served
Where downtime is measured in lakhs per hour.
01
Power Plants
Turbine housings, base frames and structural components.
02
Steel Plants
Mill housings and heavy structural machining under continuous load.
03
Cement Plants
Kiln support structures and large gearbox housings.
04
Machine Builders & OEMs
Machine bases and beds machined to the builder's own tolerance.
05
Fabrication Companies
Precision finishing on structures fabricated elsewhere.
06
Industrial EPC
Project-critical components machined against tight commissioning dates.
How we work
From drawing to dispatch.
01
Drawing & RFQ review
Share your GA drawing and tolerance requirements. Our engineers review fixturing and machining feasibility before quoting.
Typical turnaround: 24–48 hours
02
Fixture & process planning
Heavy components are planned for single-setup machining wherever possible, to hold datum accuracy across all features.
03
Machining
Horizontal boring, CNC boring, plano milling or radial drilling — executed to the drawing's stated GD&T.
04
Inspection
Every critical dimension is measured and recorded against the drawing before sign-off.
05
Dispatch
Components are packed and dispatched with inspection reports, ready to install.
Why Rajamma
Confidence to send the job that matters.
30+ years, machining only
No fabrication conflicts — every process decision is optimised for accuracy, not welding convenience.
Heavy components, single setup
Up to 15 tons machined against one datum reference, reducing cumulative error.
Emergency job support
When a breakdown puts a plant at risk, Rajamma prioritises the slot.
MSME registered
Verified small enterprise credentials for vendor onboarding and empanelment.
Trusted by procurement and plant engineering teams across
Power Sector
Steel Plants
Cement Majors
Machine Builders
EPC Contractors
Client feedback
What plant teams say after the first job.
"[Placeholder testimonial — to be replaced with a verified client quote.]"
"[Placeholder testimonial — to be replaced with a verified client quote.]"
"[Placeholder testimonial — to be replaced with a verified client quote.]"
Start a job
Send the drawing. We'll tell you what it takes to hold tolerance.
Upload a GA drawing or component sketch and our engineering team will respond with feasibility and lead time — typically within one business day.
Request a Quote