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SURELIAMachine Tools / Est 1968

Est. 1968 · Ahmedabad, Gujarat · DIN Precision

Surelia
Machine Tools.

Precision gears And Machine Spares engineered since 1968.

Custom gear manufacturing against drawing: spur, helical, bevel, worm, and beyond. DIN-class tolerances. MOQ = 1.

01 / About

Over half a century of precision.

Founded in 1968, Surelia Machine Tools, previously known as United Machine Tools, has been engineering precision gears and machine spares for industries across India.

Surelia Machine Tools is a precision gear manufacturing unit based in Ahmedabad, Gujarat. For over five decades, we have manufactured gears, shafts, pinions, and machine spares. Each piece is custom-built against client drawings with DIN-class tolerances.

We operate dedicated manufacturing facilities equipped with gear hobbing, shaping, grinding, CNC turning, and inspection capabilities. Our sister facility specialises in CNC Hobbing and advanced machining operations.

Established
1968
Previously Known As
United Machine Tools
Specialisation
Precision Gears & Machine Spares
Manufacturing
Custom against drawing
Team
5~10* workers + Technical / QC / Finance / Marketing management
Standards
DIN, IS, AGMA compliant
Location
Ahmedabad, Gujarat, India
MOQ
1 piece (minimum order quantity)

02 / Manufacturing & Quality

Our capabilities.

MOQ = 1Sister Facility ~ CNC Hobbing & Advanced
Main Facility
MFG-01

TOS Gear Hobbing

3× F.O. 6 hobbing machines for medium-diameter gears with high throughput.

MFG-02

Large-Diameter Hobbing

1× TOS F.O. 10 for large gear diameters up to 1600 mm.

MFG-03

TOS Gear Shaping

2× TOS Gear Shapers for internal gears and shoulder-restricted geometries.

MFG-04

Spline Grinding

Profile spline grinding for DIN-class ground finishes on shafts and bores, up to 8 module.

Sister FacilityCNC Hobbing & Advanced
SIS-01

3/4/5-Axis CNC-VMC

Multi-axis vertical machining centres for complex prismatic and rotational components.

SIS-02

Cylindrical & Internal Grinding

OD/ID grinding to micron tolerances. Grinding and surface grinding for plates with facing.

SIS-03

Wire-Cut EDM

Spark erosion for hardened materials and precision die-work. Slotting capability included.

SIS-04

Thread Milling

Thread milling for large components up to 3000 mm length and 8 module.

SIS-05

Gear Grinding

Generating and profile gear grinding for DIN class 5–6 accuracy. 2–8 module range.

SIS-06

Vertical Turret Lathe (VTL)

Heavy-duty vertical turning for large-diameter rings, flanges, and housings.

SIS-07

Big Bore Lathe

Specialised large-bore lathe for heavy cylindrical machining of shafts and sleeves.

SIS-08

Large Dia Cylindrical Grinding

Precision cylindrical grinding for large-diameter shafts, rolls, and arbors.

Quality Control
QC-01

Surface Table & Height Gauge

Granite surface plate with height gauge for first-article and batch inspection.

QC-02

Tooth Micrometre & Vernier

Tooth Micrometre, Vernier Calliper, Tooth Vernier Calliper for module and pitch verification.

QC-03

Tooth Protractor

Helix angle verification up to 68° using precision angular measurement instruments.

02b / Parental Facilities

Extended reach. Massive scale.

Through our parent and partner facilities, we manufacture components that exceed conventional machine limits. Girth gears to 30 metres, internal rings to 4500 mm.

Spur & Helical Gears

Heavy-class spur and helical loose gears and pinion shafts up to 7000 mm diameter in single piece with face lengths up to 2500 mm. High-precision machining and tooth cutting on CNC; any module up to 150, any diameter, with no standardised limitation. Quality to DIN / AGMA. Custom large gearbox supply as per client requirements.

Max Diameter
Up to 7000 mm (single piece)
Face Length
Up to 2500 mm
Module
Up to 150, no standard limit
Standards
DIN / AGMA

Girth Gears

Girth gears, also known as ring gears, encircle heavy industrial mill-type machines. Operating with large pinion gears under extreme loads in cement plants, mining plants, and heavy rotating equipment like mills, kilns, and crushers. Unique segmented design for customisable interchangeability. Single set-up machining for all operations: tooth cutting, facing, boring, drilling, chamfering, ID machining, and mounting holes.

Max Diameter
Up to 30 m (30,000 mm)
Machining
5-axis CNC, single set-up
Design
Segmented or single-piece
Industries
Cement, Mining, Heavy Industry

Internal Helical Gears

Internal helical gears up to 4500 mm diameter with face lengths up to 1600 mm. Manufactured using advanced CNC machinery to international standards AGMA / DIN for all high-speed and high-accuracy gear requirements. Suitable for planetary gear assemblies and large ring-gear drive systems.

Max Diameter
Up to 4500 mm
Face Length
Up to 1600 mm
Helix Angle
Up to 45°
Standards
AGMA, DIN, IS

03 / Products: Gears

Precision Gears.

8 types. Diameter 5–1600 mm. Module 0.2–16. Every gear custom-manufactured against your drawing.

Diameter Range

5 – 1600* mm

Module Range

0.2 – 16*

Tolerance Class

DIN 5 – 10

* Extended range via parental facilities

Single Helical Gears

Smooth, quiet operation with angled teeth for gradual engagement. Ideal for high-speed applications.

Double Helical Gears

Herringbone pattern eliminates axial thrust. Used in heavy-duty power transmission.

Spur Gears

Single · Duplex · Triplex

Straight-tooth, parallel-axis power transmission. Available in single, duplex, and triplex configurations.

Bevel Gears

Conical gears for transmitting power between intersecting shafts at various angles.

Worm Gears

High reduction ratios in compact space. Self-locking capability for lifting applications.

Sprockets

Chain drive sprockets manufactured to exact pitch and profile specifications.

Racks

Linear gear racks for converting rotational motion to linear. Precision-ground profiles.

Ring Gears

Internal and external ring gears for planetary drives, turntables, and rotary equipment.

04 / Products: Shafts

Shafts.

Precision-turned, ground OD and ID, and splined shafts for every industrial application.

Precision Shafts

CNC-turned shafts with tight tolerance for spindles, drive shafts, and machine tool applications.

Max Length:
4000 mm
Max Diameter:
800 mm
Tolerance:
±0.01 mm

Grinding Shafts, OD and ID

External (OD) and internal (ID) cylindrical grinding for mirror-finish shaft surfaces. Against drawing, precision ground.

Surface Finish:
Ra 0.2 µm
Grinding:
OD And ID
Accuracy:
DIN 5

Spline Shafts

Internal and external involute splines for torque transmission with axial freedom.

Type:
Involute & Straight
Standards:
DIN 5480, IS 2327
Hardness:
Up to 60 HRC

04b / Products: Pinions

Pinions.

Drive Pinions

High-precision pinions for gearbox assemblies and power transmission drives.

Module:
0.5–16
Material:
EN8, EN19, EN24
Treatment:
Case hardened

Rack & Pinion Sets

Matched rack and pinion sets for linear motion systems with precision-ground profiles.

Rack Length:
Up to 3000 mm
Accuracy:
DIN 6
Surface:
Ground finish

Pinion Shafts

Integral pinion shafts for kilns, mills, and heavy rotating equipment.

Max Length:
4000 mm
Module:
Up to 45
Application:
Kiln & Mill drives

05 / Services & Special Work

What we do.

From a single replacement gear to complete drive system manufacturing. We handle the full spectrum.

Custom Gear Manufacturing

Precision gears manufactured against your drawing. Any profile, any material, any quantity, starting from MOQ of 1.

MOQ:
1 piece
Lead time:
From 7 days
Formats:
DWG, PDF, Step, Sample

Spare Parts For Imported Machine Tools

Replacement gears, shafts, and components for imported machinery.

Reverse engineering from broken sample. No drawing required.

Gear Reconditioning

Worn gear tooth repair, re-profiling, and heat treatment to restore original specifications and extend service life.

Tooth repairRe-profilingRe-cutting

Reverse Engineering

From a broken sample or legacy part, we measure, model, and manufacture an exact replacement. No drawing required.

Capability:
CMM measurement
Output:
Technical drawing + part

Heat Treatment

In-house and partner heat treatment to specification, across the full range of case and surface processes.

CarburizingNitridingInduction hardeningThrough-hardening

Quality Control

Tooth profile and parts are tested with the best Q.C. instruments and well developed facility.

Standards:
DIN / IS / AGMA

06 / Trading Division

Industrial supply.

Category 01

Industrial Bearings

Ball, roller, taper, and thrust bearings for rotating machinery. Sourced from leading manufacturers.

SKFFAGNTNNSK

Category 02

SPM Machine And Tools, Equipment

Special purpose machines, tooling, fixtures, jigs, and automation equipment for Construction · Textile · Pharmaceutical · Agricultural sectors.

Custom SPM configurations available

Category 03

Power Transmission Components

Couplings, pulleys, V-belts, chains, sprockets, and clutches for industrial drive systems.

FennerRexnordDodge

Category 04

Industrial Fasteners

High-tensile bolts, studs, nuts, washers, and anchor fasteners to IS/DIN/ASTM standards.

Category 05

Hydraulic & Pneumatic Components

Cylinders, control valves, hydraulic pumps, hoses, and pneumatic fittings for industrial automation.

ParkerBosch Rexroth

Category 06

Industrial Raw Materials

Alloy steel rounds, forgings, and bar stock for precision machining requirements.

EN8EN19EN24EN36EN353

Category 07

CNC Machine Bellows

Accordion-style protective bellows for CNC machines, slideway covers, ball screw guards, and linear guide protection. Shields against metal chips, coolant spray, and dust contamination.

Custom sizes available against drawing

Category 08

Dealing in Machineries

Construction, machine tools, pharmacy, automation, and textile machineries.

Category 09

Standard Gear-Boxes And Motors

Dealing in standard gear-boxes and motors for industrial applications.

07 / Why Surelia

Numbers that matter.

0+

Years of Precision Manufacturing

1

Minimum Order Quantity

0

mm Maximum Gear Diameter

0.0

Minimum Module (Fine Pitch)

0

Meter Girth Gear Capability

0

Types of Gears Manufactured

Custom manufacturing against every drawing. No minimum complexity.

DIN-class tolerances maintained across full diameter and module range

Parental facility capability up to 30-metre girth gears

08 / Contact

Request a quote.

Send us your drawing or specifications. We respond within 24 hours with a detailed quote.

Contact Persons

Manufacturing Unit

77, A Dev Aditya Industrial Estate
Dhamatvan – Bakrol Road
Ahmedabad, Gujarat 382430
India