Welcome to Spring Die Mould Part

Spring Die Mould Part Industry Company Limited found in Ningbo in1997 under control of WELLBO INTERNATIONAL,with its geographical advantage is around 13 kms to Beilun Seaport and 2 hours drving to Shanghai Airport.Holding 3 workingshops seperately produce Mould elements,Springs and Fasteners and combine sales.

Factory own full sets of  advanced equipments imported from Swiss,Italy and Japan,heat-treatment line desined by ourself and testing facilities open in all day.Strictly fulfil overall quality control from materials sourcing to products delivering,make sure every product with SDMP mark be a symbol and guarantee of high standard quality.

Under all supports,SDMP Products have been sucessfully exporting to ASEAN,America,Britain,Egypt,Oceanica,Italy,India,Spain,Turkey,Middle east and welcome by more and more markets!

General Hardware Accessories oneline Store

SDMP online store also supplies a massive range of high quality parts, tools, selecting the right products for your section is extremely important, consumables and accessories. With over 10 years experience, we pride ourselves on delivering quality service, at the best price for next day delivery.


Choose the right favorite produts


DIN/ISO 10243 Series Die Springs

Rectangular section wire coil springs Innovative technology longer life

equivalent quality ISO 10243 spring like Bordignon, Tohatsu, Misumi,Special,Daitong,PSE.Can customize color to satisfy different markets. Guaranty is 6 months usually or longer subject to order.


Guide Pillar and Bush Series

The most best selling straight pillar,shouldered pillar and headed bush in the mold industry

Material: Skd61, suj2,16CrNi4,1.7262,100Cr6,AC45 or equivalent
Hardness: HRC58~62. Use for plastic and metal casting die
Heat treatment:carburized and fine grinding.


Ejector pin, Sleeve, Blade Series

Quality Ejector Pin, Ejector sleeve and Ejector Blade

Made from super SKD61 (EN52100,12344)hardened different in Core, surface and head,Bright and oxided black PVC coating popular in different markets

rectangular wire helical die springs sdmp

JIS B5012 helical springs

Yellow/lightest load,blue/light,red/medium,green/heavy,brown/ultra heavy

SDMP rectangular wire helical springs widely used in fields of plastic injection mould industry, metal casting die,automobile,elevator,punching machines,instrument, machinery,fixture, jig and some industrial facility.

spring plunger allen key

Spring ball plunger

 Screwdriver slotted and allen key in alloy steel and SS full sizes

Specification Housing: Steel, hardened, black oxide finish Ball: Steel, hardened, plain finish Spring: alloy spring Steel SWP A/B/G Zinc plated ball indicates heavy spring load


Nylon Parting lock clamp

M5*10 ,M6*13, M8*16, M10*20

Parting lock for injection mould industry in color blue,white,yellow,orange,black.Normal quality can work under 180 centigrade degree,top quality can work under 260 centigrade degree.When order please advise temperature.

suj2 sprue bush

Sprue Bush in ejection molding application

Specialized in producing precision sprue bushing typ A B C. All goods Polishing in the R position of head,lapping at end surface.Reliable quality at competitive price suitable for bulk purchase. Matrial: SC45 HRC 50˜55,suj2 HRC 58˜62,SKD61 HRC 58˜64


SHOULDER SCREW stripper bolt

ISO7379 Shoulder screw class12.9 in metric and inch size

Size M5, M6, M8, M10 ,M12.Length:20-120mm

Class 12.9 hardened Material of SCM435,Hardness: HRC33-40.Good finish shaftblack head.Misumi stripper bolt made as well

round taper lock square lock clamp

Round taper Lock & Square lock clamp

Molding straight block set

Material: SKD11,S45C,YK30.• Hardness: HRC54˜ 56(45c) HRC 58 ˜60(SKD11).Customized size is available.


HSS twist drill bit

DIN1897 Straight shank twist drill

made of HSS, carbon tool steel,alloy tool steel,(T10A,T12A 9SiCr,CrWMn)
Surface finish: TiN,TiC, AlTiN,Micro hardness: HV10000,Long working life, high wear resistance and impact-resistant performance.


pvc coating HSS punch

Piercing pin and hss punch pvd coating

For special custom-made core pin please provide your drawing or samples. At first initial stage no moq for special pin.Coating:TIN,ALTN,TCN…Surface hardness:HV1800-2200 or more according your request.

date stamp,recycle insert stamp

Date stamp,Recycle insert stamp

Size:D*L= 4X6, 5X8,6X8,8×10,10×10,12×12,16×14,20×14

1)Material is SUS420 or similar 2)Hardness is HRC48-52 3)Type: only year;only month; year&month 4)Standard


Customer Testimonials and News


Attend Die & Mould Fair

Shanghai New International Expo Centre ,China.Time:June18 -21,2017




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china international hardware show

Attend China International Hardware Show

China International Hardware Show (CIHS) is Asia’s top trade fair for the entire hardware and DIY sectors offering specialist traders and buyers with a comprehensive category of products and services.Read More »

Tour and Take Photo

S.africa Customer purchase team presentatives visted our production line in 2015 July,checking samples rooms for interested parts, have a meal together, during it both us exchanged experience in each markets. It was a fuitful visit for them, it is much helpful to deepen our cooperations.

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New Year Celebration

At the 2018 Group New year’s Party, the company praised the outstanding employees, invited overseas customers to join us, reviewed the development of the past year, every people with full of confidence in the development of the coming year.

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