The Ensat self-tapping threaded insert

1 Ensat self - tapping threadedinsert .. Ensat is a self - tapping threaded insert with external and internal thread, cutting slots or cutting continuous process of further development has brought about a number of major improvements to product -S 302(with cutting slot) is recommended formost application cases. In certainmaterials, this Ensat demonstrates aminimal inward springing action, socreating a certain screw locking effect.(see page 7 to page 10)If this effect is not required, we recommend using Ensat -SB 307 -SB 307/308(with cutting bores) was developed for materials with difficult cutting properties.

2 This insert has a thick walland the cutting force is distributed overthree cutting short version Ensat 307 is particularly suitable where minimal material thicknesses are involved(see page 11 to page 15).Thin-walled Ensat -SBD 347/348for applications involving special space conditions (residual wall thicknesses), and also suitable for driving using a thread tapping machine (same internaland external thread pitch, see page 19). Ensat -SBS 337/338with three chip reservoirs. Used primarily wherever only a small amount of chips may be permitted tooccur during the tapping process(see page 16 to page 18).

3 Ensat -SBT 357/358with closed floor for additional sealingfrom below. (see page 21).Fields of applicationThe Ensat is used throughout thewhole of the metal and plastics proces-sing industry. Automotive Plant and equipment construction Railway supply industry Electro-technics and laboratorytechniques Household appliance Medical engineering OffshoreThread reparationEnsat is ideally suited for the fast repair of torn and damaged same screw size can be used features The Ensat has a large effective shearing surface, so ensuring a higherdegree of pull-out strength, an Ensat M4 is often sufficientinstead of a cut M5 thread(see page 5, Fig.)

4 2). The Ensat is driven subsequentlyinto the finished workpiece. Thismeans a higher casting machine output, no rejects due to incorrectly cast-in insert components, no moulding sand trapped in the thread. A pre-cast or pre-drilled retaininghole with normal tolerance requirements is sufficient for drivingin the Ensat . The thread is always precisely positioned. The Ensat is insensitive to smallareas of shrinkage. The Ensat -systemprevents damage caused by torn coverIn a workpiece made of a light alloy,the Ensat 302 achieves almost maxi-mum pull-out strength with only 30%flange cover (Fig.

5 3).Pull-out strengthThe Ensat is capable of withstandinghigh loads. When used in light alloys,for example, a degree of pull-outstrength is achieved which far exceedsthe yield strength of the mating (Fig. 4). technologies for a reliable using threaded insertEnsat permit substantially smaller dimensions and consequently materialand weight-saving illustration below (Fig. 2) shows ascrew connection with different screwcross-sections. Despite the smallerFig. 4 Fig. 3 Test load P[N]Flange cover of theexternal thread [%] Ensat WorkpieceEnsat WorkpieceBoreholediameter30 % flange cover70 % flange coverBoreholediameterM 12M 10M 8700006000050000400003000020000100000010 2030405060708090 100%900008000070000600005000040000300002 0000100000 Pull-out resistance [N] M 3M 4M 5M 6M 8M 10M 12M 14 WorkpieceG AI Si 12 (Cu) Ensat Case-hardened and galvanised steel(302)(308)

6 Yield strength of a screw -internal thread screw cross-section, a screw joint withan Ensat is capable of withstandinghigher axial forces than the screw jointwith larger screw cross-section; becausethe force both under static anddynamic load in the Ensat malethread is distributed evenly over the individual thread turns of the Ensat male 2 Material: e. g. AluminiumE = Diameter cut thread = Outside diameter of the Ensat F FEE20%20%20%20%20%50%25%12%7%4%2%The Ensat pull-out resistance due toflange cover .. case of processing problems ( increased screw-in torquelevels) there is generally no harm in selecting diameter data in the nexthighest column.

7 In case of doubt, weadvise carrying out a Ensat in the workpiece ..PartRetaining holeThe retaining hole (L) can be simply drilled or integrated into in the (N) the borehole (Fig. 6)is recommended in order to: Prevent the workpiece surface frombeing raised Permit screwing in to a greater depth Ensure improved initial cutting characteristics Material thickness:Length of the Ensat = smallest admissible material thickness of the blind hole:Minimum depth (T) see Works Standardpage 7 to diameter:Brittle, tough and hard materials call for a larger borehole than soft or elasticmaterials.

8 For guideline values, seeWorks Standard page 7 to distance:The smallest still admissible edge dis-tance W (Fig. 6) depends on the plan-ned stress level and the elasticity of thematerial into which the Ensat is recommendationThe Ensat should be rocessed ,1 0,2 mm recessed (Fig. 5). Afterprocessing, the Ensat can be immedia-tely subjected to load. If the componentmaterial permits subsidence of theEnsat under load, the Ensat can onlyexecute an axial movement of 0,1 to0,2 mm. In other words, the pretensionof the screw union is largely retained,loosening of the screw connectionunder dynamic load is impededGuideline values for countersink:N = 0,06 to 0,08 x E + EGuideline values for light alloys:W 0,2 to 0,6 x EGuideline values for cast iron:W 0,3 to 0,5 x EE = Outside diameter of the Ensat [mm]WTFig.

9 6 Fig. 50,1 0,260 technologies for a reliable driving this page, you can configure the optimum tool for your application. A configuration is provided inthe following as an illustrative article number is composed of two sequencesof numbers and starts with the tool shank (Fig. 9)which should be selected in accordance with youroutput. Also encrypted in this number are the special versions for thin-walled Ensat (620 1 and 621 1)and for very high driving torques (622 0 and 623 0)which are available as standard only as a squareshank. Other non-standard geometries can be evaluated as standard besides the tools illustrated.

10 The second sequence of numbers in the table (Fig. 9) indicates the thread code of the femalethread. The tightened dimensions of the tools areshown on the next page. Tool for deep located retaining boreholes (long)Tool for accessible retainingboreholes (short) 1 Shank4 Stop pin9 Ball5 Fixing screw6 Ball bearing2 Shell3 Guide bush7 right length of the threaded pinfor the Ensat with cutting slot orwith cutting bore is calculated fromthe pitch of the female thread(see also Fig. below; P = pitch of the female thread).Setting or exchangingthe stud Pull the shell (2) downwards off the shank (1).