Precision Engineering Since 1965

Precision
Piston Pins
Built to Endure

Export-quality piston pins for compressor and engine applications. Precision ground to 5 microns. Small-batch flexibility. Proven international supply.

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59+
Years of Operation
5μm
OD Tolerance Capability
58–62
HRC Case Hardness
ISO
9001:2015 Certified
Application Areas

Industries Served

Precision piston pins manufactured for specific duty requirements across five distinct industrial and commercial applications.

Marine Compressors
Marine Compressors
Starting air compressors for marine vessel engine starting systems. High-cycle fatigue rated.
Industrial Air Compressors
Industrial Air Compressors
Reciprocating air compressors for industrial plant and manufacturing applications.
Refrigeration Compressors
Refrigeration Compressors
Commercial and industrial refrigeration compressors across major OEM brands.
Diesel Engines
Diesel Engines
Lister and Petter type engines from 8 HP to 114mm bore. Agricultural and industrial duty.
Automobile Engines
Automobile Engines
Passenger vehicle and light commercial engine piston pins to OEM or custom specification.
The Product

Precision Piston Pins

Hollow and solid piston pins manufactured to OEM drawing specifications or customer-supplied samples. Each pin is centreless ground, case carburised, and dimensionally verified before dispatch.

Precision ground piston pin
Piston pin batch production
Pin dimensional inspection
Core Capabilities

Engineering Strengths

Every component manufactured with strict dimensional control — suitable for OEM and aftermarket replacement in demanding operating environments.

5 μm
OD Tolerance Control
Precision centreless grinding delivers outer diameter tolerances as tight as 5 microns — critical for interference-fit applications in high-load compressor assemblies.
58–62 HRC
Case Hardened Surface
Carburised and hardened using 16MnCr5 / 20MnCr5 grade steels. Surface hardness of 58–62 HRC ensures fatigue resistance and long operational life under cyclic loading.
Custom
Flexible Order Quantities
Capable of handling varied order profiles without compromising dimensional consistency. Suitable for both aftermarket and OEM replacement supply.
Export-Quality Manufacturing
Currently supplying precision piston pins to an OEM marine equipment company. All components meet international dimensional and hardness standards.
ISO 9001:2015 Certified
Quality management processes certified under ISO 9001:2015. View certification →
Reverse Engineering Support
Legacy pin dimensions replicated from drawings or physical samples. Suitable for discontinued compressor models requiring aftermarket support.
Our Positioning

Why Excel Industries

The Case for Precision

Reliability Over
Throughput

In compressor and engine applications, a single out-of-tolerance pin causes premature wear, unplanned downtime, and costly overhauls. We treat each batch — regardless of quantity — with the same dimensional rigor applied to high-volume production.

Our centreless grinding process consistently holds 5 microns on outer diameter, ensuring correct running clearances and even load distribution across the pin bore.

CORE PHILOSOPHY
"Consistency, precision,
and long-term reliability."
01
Dimensional Consistency
Batch-to-batch repeatability maintained through fixed process parameters and 100% final inspection.
02
Flexible Order Capability
Capable of managing varied order profiles across aftermarket and OEM service inventory requirements.
03
Material Traceability
Steel grade confirmed before production. Alloy grade documentation available on request.
04
OEM & Aftermarket Supply
Supplying both first-fit OEM and aftermarket replacement channels — domestically and internationally.
Company Background

About Excel Industries

A precision component manufacturer with over five decades of production experience in piston pins for compressor and engine applications.

Company History

Operational History

  • Founded — 1965
    Established as a manufacturer of precision components for agricultural engine applications. Early production focused on components for stationary diesel engines used in the farming sector.
  • Transition — Compressor Aftermarket
    Shifted focus to the compressor aftermarket sector. Recognised demand for high-precision piston pins for refrigeration and industrial air compressor overhaul requirements.
  • Precision Grinding Investment
    Acquired centreless grinding capability, enabling OD tolerance control to 5 microns. This became the defining technical differentiator of the facility.
  • Export Commencement
    Began supplying precision piston pins to an OEM marine equipment company. Demonstrated capability to meet international dimensional and quality documentation standards.
  • ISO 9001:2015 Certification
    Quality management system formalised and certified under ISO 9001:2015, establishing documented processes for inspection, traceability, and corrective action.
Technical Profile

Manufacturing Profile

Established1965
Product FocusPrecision Piston Pins
Batch SizeAs per order
OD Tolerance5 microns capability
Materials16MnCr5, 20MnCr5, IS 1018
Surface Hardness58–62 HRC (case carburised)
CertificationISO 9001:2015
Market ReachDomestic + Export (Marine OEM)
Core Operating Principle
"Consistency, precision, and long-term reliability — not volume throughput."
Product Range

Piston Pin Catalogue

Manufactured to OEM drawing specifications or customer samples. Custom sizes available.

Product Categories

By Application

BOCK
BITZER
CARRIER
CMO
COPELAND
DAIKIN
BITZER 55 MM
ELGI
GRAM
GRASSO
KIRLOSKAR
MYCOM
SABROE
VOLTAS
WHIRLPOOL
YORK
K.G. KHOSLA 215/130
K.G. KHOSLA 225/130
ATLAS VT4
LISTER 8 HP
LISTER 10 HP
LISTER 12 HP
LISTER 14 HP D.I.
PETTER 80
PETTER 85
PETTER 95
PETTER 102
PETTER 114
CUSTOM MANUFACTURE

Marine Compressor Pins

Manufactured to OEM drawings or physical samples. Currently supplying to an international marine OEM customer.

Submit Drawing
CUSTOM MANUFACTURE

Automobile Engine Pins

Manufactured to OEM specification or customer-supplied drawings.

Submit Drawing

Custom sizes: Available as per customer drawings or physical samples.  |  Reverse engineering: Possible for legacy and discontinued compressor models.

Technical Drawing

Component Anatomy

Dwg 787X121 · Rep. Sample
12345 ABCD 110 −0.3 ⌀30 −0.004 / 0 ⌀20 ±0.1 Ra 0.06 Ra 5 Ra 5 ⟂ 0.002 A ◯ 0.0015 A X MANUFACTURER'S MARK — EI DETAIL X — SCALE 10:1 0.2 − 0.5 max 20° R 0.2 − 0.5 MATERIAL & TREATMENT Material: 16MnCr5 (alt. 17Cr3) Case-hardening low-alloy steel Case hardened: 850 − 900 HV1 Equivalent to 58 − 62 HRC surface Case depth: 0.8 mm after grinding Limit hardness at 0.8 mm depth: 500 HV REV DESCRIPTION DATE APPROVED — Initial issue 2016-10-13 Waldow A Re-issue — representative sample 2026-04-23 EI / VJ EXCEL INDUSTRIES PRECISION PISTON PINS · SINCE 1965 DRN CHK APP VJ EI — PISTON PIN Ø30 × 110 HOLLOW · GUDGEON · CASE-HARDENED SCALE 2:1 REV A MATERIAL 16MnCr5 WEIGHT 0.34 kg DRAWING NO. 787X121 TOL. ISO 2768-mH · FINISH DIN ISO 1302 · EDGES DIN ISO 13715 · ISO 8015 THIRD-ANGLE
Configure
Enter your dimensions
mm
mm
mm
Tolerances, surface finishes, material & heat-treat remain per our manufacturing standard. Enter ID = 0 for a solid pin.
Outer Diameter
⌀30 −0.004
5 μm tolerance · h5
Inner Diameter
⌀20 ±0.1
Hollow variant
Length
110 −0.3
Face ground both ends
Surface Hardness
58–62 HRC
850–900 HV1, 0.8 mm case
Material
16MnCr5
Alt. 17Cr3 · 20MnCr5
Surface Finish
Ra 0.06 / Ra 5
OD lapped · faces ground
How We Work

Manufacturing Process

A controlled, sequential production flow from raw material to finished components. Centreless grinding is the defining precision step.

Process Flow

13-Stage Production Sequence

01
Raw Material Selection
16MnCr5 / 20MnCr5 / IS 1018
02
Bar Cutting
Per drawing length
03
Hollow Boring
ID per specification
04
Ball Broaching
ID finish & dimension
05
CNC Turning
OD near-net + chamfers
06
Pre-Hardening Inspection
OD · ID · Length · Geometry
07
Case Hardening
58–62 HRC
08
Face Grinding
Length & parallelism
09
Centreless Grinding
OD TOLERANCE: 5–10 μm
10
Chamfering
Per drawing profile
11
Lapping
Surface finish Ra
12
Final Inspection
100% OD · Length · Surface
13
Preservation & Packaging
Rust preventive + labeled
Production Infrastructure

Facilities & Equipment

Core in-house capability focused on precision grinding, broaching, and dimensional inspection.

[ Centreless Grinding Machine — Photo ]
Centreless Grinding Machines
High-precision centreless grinders capable of holding OD tolerances to 5 microns. Multiple machines maintained to ensure production continuity. Work-rest blade and regulating wheel set-up controlled and documented per component type. This equipment represents the core technical capability of the facility.
[ Face Grinding Machine — Photo ]
Face Grinding Machines
Dedicated face grinding equipment for precise length control post-hardening. Ensures parallelism of end faces and accurate finished length to drawing. Parameters controlled to prevent thermal damage to the hardened case.
[ Ball Broaching Setup — Photo ]
Ball Broaching Setup
In-house ball broaching for internal bore finishing. Produces consistent ID surface finish for compressor pin bore fit and floating pin applications. Tooling replaced on defined intervals.
[ Inspection Instruments — Photo ]
Precision Inspection Instruments
Calibrated outside micrometers (0.001mm resolution), bore gauges, dial indicators, V-block concentricity checking, and length measurement gauges. All instruments maintained under calibration schedule. Batch inspection records retained.
Quality Assurance

Quality & Certification

Dimensional control, process discipline, and documented inspection at every critical stage.

Inspection Process

Quality Control Steps

STEP 01
First-Article Inspection
First piece of each batch verified before full batch proceeds. OD, ID, length, and concentricity checked against drawing. Inspection record raised and retained.
STEP 02
Dimensional Verification
OD measured at multiple points along length to detect taper. ID checked for bore finish and conformance. Length verified post-face grinding.
STEP 03
Tolerance Control — OD
Centreless grinding targeted at 5–10 micron on OD. Process parameters confirmed on first article. Spot checks maintained during production run.
STEP 04
Concentricity Check
Hollow pins checked for wall thickness concentricity using V-block and dial gauge. Ensures uniform wall thickness and correct mass distribution.
STEP 05
Surface Finish Control
Ground surface finish confirmed visually and by comparative methods. Lapped pins inspected for uniformity. Defects, cracks, or handling marks rejected.
STEP 06
Final Inspection Before Dispatch
100% visual and dimensional inspection of completed batch. Batch summary record with dimensions, quantity, and inspector identification. Retained for traceability.
ISO
9001
:2015
ISO 9001:2015 Certified
Quality management system certified under ISO 9001:2015. Covers design, manufacture, inspection, and dispatch of precision piston pins. Certification demonstrates a documented, auditable approach to quality control and continuous improvement.
View ISO Certificate (PDF)
Get In Touch

Contact Us

Send us your drawing or sample for quotation. We respond to all technical enquiries within 2 working days.

Company Details
Company
Excel Industries
Address
Surat, Gujarat, India
[Full address to be added]
Phone
+91 (0) 261 XXX XXXX
Email
oem@excelindustries.in
Business Hours
Mon–Sat: 9:00 AM – 6:00 PM IST
Technical Enquiries

For quotation requests, provide: component drawing (PDF/DWG), material specification, required quantity, and application details. Physical samples accepted for reverse engineering.

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