Dff Fastening/ Dff Rail Fastening system for Underground

DFF fastening Technical peculiarities :

Driving speed: ≤ 250 km/hAxle load: ≤ 26 tTension clamp: Skl 21Adjustability: height, gaugeElastic cellentic rail pad for less vibration and protection of the track

The DFF Fastening is a single support point with screw-dowel combination for anchoring on slab tracks, is based on the well-proven fastening solution W-Tram. A reinforced base plate offers a bigger surface for traffic load distribution: the system is able to withstand axle loads of up to 26 t and is therefore suitable especially for Metro and conventional rail projects.

Zhongbo Railway Fastening Company is a leading Chinese manufacturer of rail fastening and rail joint bar.

Zhongbo, as a specialized rail fastener manufacturer, provides a complete line of products, including rail fastening, anchor, rail joint, rail clip, rail screw, anchor bolt, rail clamp plate, rail fishplate, and fishplate bolt for connecting rail tracks.

We also make rail fastenings for crane rail and elevator guide rail, along with other related products. We manufacture according to GB/TB (Chinese national standards and railway standards), AREA, UIC, BS, DIN, ASTM, and AS standards.

Our products are mainly made through hot forging.

The threads of rail screw spikes are made by hotrolling with special threading machines.

We produce metric threads, BS, BSW, TR thread, or round threads.

Our high strength bolts come in different specifications of Class 4.8, 4.6, 5.6, 5.8, 6.8, 8.8, 10.9, and 12.9. A variety of non-standard fastening is also available. We can customize our products using customer drawings or samples as well.

rail fasteners




rail fasteners


rail fasteners with rail clip

Ourproductsareperformingwidelyinmorethan50countriesintheworld,forexporting,therearemainlydividedfourareasasbelow:
AmericamainlyinUSAand,Canada,MexicoandBrazil:
WesupplyEtyperailfastening,W14railfasteningsystems,railclipstometro,tramwayfastenings,cranerailclips,trackboltsandjointbarforrailconnection,screwspikes,tieplatesandconcreteringsconnectionboltsfortunnels.TheyaremainlyaccordingtostandardsofAREMA,IFI,ASTM,UICandotherspecificationsfromclients.
WestEuropeandAfricaareasmainlyinSpain,German,SouthAfricaandNigeria:
WesupplyWrailfasteningsystems,springbladefasteningsystems,KPfasteningsystem,metrorailfastenings,fishplatesandfishplatebolts,sleeperscrews,lockspikes,spearboltsfortunnelsetc.TheyaremanufacturedtostandardofUIC,NF,DIN,BSandotherspecificationsrequestedbyclients.
EastEuropeandMid-AsiaareamainlyinRussia,Kazakhstan,wesupply:
Wrailfasteningsystems,KPfasteningsystem,railjointbarsandtrackbolts,trackspikesandtieplatestothisarea.WemanufactureandsupplyaccordingtostandardGOST,UIC,DINandotherspecificationsrequestedbyclients.

AustraliaandSoutheastAsiaareamainlyinAustralia,Thailand,wesupply:
Etyperailfastening,Wrailfastening,heavyhaulrailfastenings,metrorailfastenings,fishplateandbolts,trackspikes,turnoutaccessories,concreteringconnectionboltsetc.WemanufactureandsupplyaccordingtostandardBS,AS,JIS,UICandspecificationsrequestedbyclients.