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{"title":"21V Brushless Cordless Chainsaw With 12 Inch Guide Bar Battery Powered Pruning Chainsaw For Tree Trimming","imgUrl":"https:\/\/img.chinax.com\/nimg\/53\/05\/bd49e523b6dde8665a24641d3976-200x200-1\/21v_brushless_cordless_chainsaw_with_12_inch_guide_bar_battery_powered_pruning_chainsaw_for_tree_trimming.jpg","attrs":{"Chain Pitch":"3\/8 inch (9.525mm)","Net Weight":"2.5-3.5kg with bar and battery","Model Number":"JP-LJ12TX","Certification":"CE"}}
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Oil-free air compressors and 21V cordless power tools, engineered and assembled in-house since 2011.
Nantong Shengqiang Machinery Manufacturing Co., Ltd. (SHJPAI) manufactures oil-free air compressors and cordless power tools in Nantong, China. Two lines under one roof: silent oil-free piston compressors from 750W to 10kW with 12L to 320L tanks, and a 21V brushless cordless platform covering drills, impact drivers, angle grinders, circular saws and chainsaws.
Our 15,000 sqm facility produces up to 300,000 units a year with a team of 100-200, and over 90% of output is exported. We manufacture for RILAND, JASIC, LAUNCH and HUGONG, and support OEM/ODM from tooling and colour customisation to retail-ready packaging.
2011
FOUNDED
15,000 sqm
FACTORY
300,000
UNITS / YEAR
90%+
EXPORTED
OUR TWO LINES
Oil-Free Air Compressors
750W-10kW silent piston, 12L-320L tanks
8 bar working pressure | 118-850 L/min
Dental, medical, automotive, workshop
21V Cordless Power Tools
Drills | impact drivers | 100/115/125mm grinders
115-165mm circular saws | 12 inch chainsaws
One battery platform across the range
OEM / ODM
Manufacturing for RILAND | JASIC | LAUNCH | HUGONG
Custom logo, colour, packaging and manual | MOQ from 100 sets per model
Shengqiang Electromechanical, Huancheng North Road, Lusi Port Town, Qidong City, Nantong City, Jiangsu Province
Factory Location:
Shengqiang Electromechanical, Huancheng North Road, Lusi Port Town, Qidong City, Nantong City, Jiangsu Province
Trade & Market
Company slogan:
Two Product Lines. One Factory. Sixteen Years of OEM.
OEM Overview:
OEM / ODM
Built to Your Brand, Not Ours
We already build for national brands and retail chains, so private-label work is routine rather than a special project. Five things can be customised, and the path from brief to container is fixed.
WHAT CAN BE CUSTOMISED
01
Brand & logo
Laser engraving or silk-screen printing on the tool body, battery pack, nameplate and carton.
02
Appearance
Shell colour matched to your Pantone code, plus surface texture and finish to your sample.
03
Packaging
Private-label colour box, manual, insert card and outer carton - artwork checked before print.
04
Performance
Voltage, power, torque and speed set to the standards of your target market.
05
New models
ODM development from your drawing, sample or concept, through tooling to mass production.
HOW A CUSTOM ORDER RUNS
01
Requirement brief
Application, target price, certification and volume.
02
Technical review
Feasibility, motor and battery selection, tooling route.
03
Quotation
Unit price, MOQ per custom item, tooling cost, lead time.
04
Prototype
Sample built and tested against the agreed specification.
05
Sample approval
You sign off the sample; we freeze the BOM and artwork.
06
Mass production
Batch run, in-line QC and pre-shipment inspection.
MOQ
Set per custom item, not per container. A logo or packaging change carries a lower minimum than new tooling.
SAMPLES
Every custom sample is tested before the bulk order is released - performance, safety and finish.
CONFIDENTIALITY
Your drawings, brand files and buyer list stay with the project team. No reference customers, no shared moulds.
Production Line:
PRODUCTION LINE
Six Workshops Under One Roof
Integrated manufacturer and trader | Global B2B export
Nantong Shengqiang Machinery Manufacturing Co., Ltd. is based in Lusi, Qidong, Jiangsu, on a 15,000 sqm factory site. Casting, machining, tank fabrication, assembly, inspection and warehousing all happen inside the same fence - nothing is sent out for the critical steps.
01
Aluminium Die-Casting Workshop
In-house casting of the metal bodies for tools and compressors.
02
Aluminium Parts Machining
Turning, milling and drilling to a 0.01 mm tolerance.
03
Pressure Tank Fabrication
Rolling, welding and testing of air-compressor receiver tanks.
04
Complete-Machine Assembly
Dedicated lines for cordless tools and oil-free compressors.
05
Motor Store
Climate-controlled buffer stock for core motor assemblies.
06
Finished-Goods Warehouse
Labelled, palletised and held until the container is booked.
WHAT THIS MEANS FOR YOUR ORDER
Core parts are made in-house, so the schedule is ours to control.
The factory runs on ERP with 5S applied on the floor. Motor, cylinder, head and tank assemblies for cordless tools and oil-free compressors are developed and produced on site; supporting parts come from audited suppliers who are re-checked on a fixed cycle.
Because every stage sits in one plant, a change request or a quality issue is solved on the floor - not negotiated between subcontractors.
15,000 sqm site | 300,000 units per year | 90%+ of output exported | 40% efficiency gain since the 2024 automation upgrade
Manufacturing and trading sit in the same company, which is why we can answer a custom request without a middle layer: OEM and ODM projects, mixed containers and private-label packaging are quoted and scheduled by the people who run the line.
We supply distributors, brand owners and importers who need a factory that can hold a specification over repeat orders - with one contact accountable for quality, lead time and documentation.
R&D:
R & D
Developed In-House, Then Proven Before It Ships
An independent R&D team works only on cordless power tools and oil-free air compressors. Everything from the control board to the motor is developed here, which is why a specification change does not need a third party's permission.
WHAT THE TEAM DEVELOPS
New product conception
Structural design from a blank page: housing, ergonomics, airflow path and serviceability.
Brushless motor development
Winding, magnet and rotor tuning for torque curves that match how the tool is actually used.
Control board design
Circuit and protection architecture for 21V platforms - over-discharge, over-heat and stall cut-off.
Simulation and prototyping
Prototype builds plus reliability testing before a model is offered to any buyer.
Upgrades on existing models
Function and cost improvements on items already in your catalogue, without changing fit or accessories.
BEFORE A MODEL IS RELEASED
AGING TEST
Continuous run at rated load to expose early failures before release.
DURABILITY TEST
Repeated drop, cycle and thermal stress to the limits of the target market.
SAFETY INSPECTION
Insulation, leakage and protection checks against the destination standard.
We hold multiple utility model patents covering power tool and air compressor structures, and take on ODM projects developed to a customer's own technical specification - drawing, sample or concept. New models are added every year to keep pace with overseas market requirements.
Our Team:
THE TEAM
Six People Who Handle Your Order
A supplier is only as good as the people answering your emails. Your account is handled by one named contact from quotation to container - backed by a QC engineer who signs off every batch before it leaves.
The team covers regional sales, order follow-up, technical adaptation, freight coordination and pre-shipment inspection. Between them: 38 years of export experience, 50+ long-term accounts and 400+ export batches inspected.
A
Amy
EUROPE & NORTH AMERICA
Ten years in export sales, with more than 50 long-term buyers. Handles bulk negotiation, private-label projects and regional compliance requirements.
W
Will
JAPAN
Works only on the Japanese market: industrial standards, retail rules and channel practice. Helps Amazon JP sellers and local distributors shape their range.
G
Gem
AFTER-SALES & ORDER OPTIMISATION
Six years in export service. Covers parameter adaptation, freight coordination and after-sales case handling from first claim to closure.
L
Lee
SOUTHEAST ASIA & MIDDLE EAST
Eight years in emerging markets. Builds local channels and writes customised sourcing plans for lithium tools and oil-free compressors.
T
Tian Ye
ORDER FOLLOW-UP & QC
Seven years tracking export orders, with more than 400 batches reviewed. Controls each production milestone so delivery dates hold.
Y
Ye
ON-SITE QUALITY CONTROL
Runs on-line sampling, finished-goods performance testing and full pre-shipment inspection at the factory before any container is loaded.
Your enquiry is answered by the person who will run your order - not a shared mailbox.
History:
MILESTONES
From One Assembly Line to 300,000 Units a Year
Fourteen years of building compressors and cordless tools - the dates that changed what we could make, and for whom.
2011
Company founded in Nantong, Jiangsu; air compressor assembly starts on the first line.
2014
Became a supplier to FutureWanjia, one of China's largest tool retail chains.
2016
Awarded multiple invention patents for compressor and power tool design.
2018
Began supplying six listed companies, entering OEM programmes for national brands.
2019
Annual sales passed RMB 100 million.
2020
Shanghai branch opened to handle export sales and overseas enquiries.
2021
Launched the 21V cordless power tool line - drills, grinders, saws and chainsaws.
2022
Certified as a National High-tech Enterprise.
2024
Automation upgrade on assembly and testing lifted production efficiency by 40%.
2025
Serving more than 100 brand customers across compressors and cordless tools.
Service:
QUALITY CONTROL
Six Inspections Before Any Unit Ships
From incoming aluminium to the final pressure-hold check, every compressor passes six inspection points on our own line. No unit leaves the factory without a full run test.
01
Motor Testing
Voltage, power, current, load and airflow checked on every motor, plus a turn-to-turn test before assembly.
02
Incoming Material Inspection
Aluminium parts are sampled from each batch at a fixed ratio; outside diameter and thickness are measured with a 0.001 mm digital caliper.
03
Motor Coil Inspection
Dielectric strength and insulation resistance are tested on every coil - the two values that decide motor output and operator safety.
04
Aluminium Component Precision
Machined parts are cleaned and calibrated in two steps, then checked with a vernier caliper to hold bore, curve and clearance within 0.01 mm.
05
Complete Unit Testing
Each compressor is powered up and run through a full machine check, then passed to the final test station only if every reading is normal.
06
Pressure Hold Test
The unit runs up to working pressure on the line, is locked and moved to packing, where the pressure is verified and released.
After the sixth checkpoint the unit is packed, labelled and moved to finished-goods storage. Test records stay with the batch number, so any unit can be traced back to its inspection data.
Factory Information
Market name:
South America,Western Europe,Eastern Europe,Eastern Asia,Southeast Asia,Middle East
