BTL. Taper bushing A. PLATE SPROCKET REBORE TO "G"DIMENSION. WELD TAPER WELD. ON HUB TAPER SPROCKET

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1 is a new type of component used for joining mechanical transmission. It changed from the traditional design and now features easy-on, easy-off construction and high standardization. The grip is tightened through its taper surface, excellent concentricity and non-clearance joint, its transmission efficiency can also be raised. The sizes of taper bushings are designed in a standard series. The bore, Keyway and thread are machined in accordance with ISO standard. It is interchangeable and the customers can make their own choice according to their purpose and usage. This new type of taper bushing is now widely used. Grey cast iron is the common material for BTL taper bushings. If high tensional bushing is required, ductile iron, steel and forged steel can be used. Bushing made of stainless steel can be used together with sprockets, clutches, gears and other transmission parts which are also made of stainless steel. When taper bushing is used with other transmission parts in constant starting and stopping, it will cause damage to the bore and keyway and this will degrade precision due to pressing loads. If the damage is severe the whole transmission part should be replaced BTL includes: taper bushing itself and tightening screws. (also including packaging) The range for its usage can be enlarged if a weld-on taper hub is used. TPER WELD. ON HUB. PLTE SPROCKET REBORE TO "G"DIMENSION. WELD TPER SPROCKET 4

2 .Bushing's type and loading capacity.. General type.. Dimension series: this type is divided into three series according to its load-bearing capacity and number of tapped holes: ) light series: type 008- Have two un-tapped half-holes for tightening screws and one semi-tapped holes for releasing. ) Medium series: type Have three half-holes for tightening screws and two half-tapped holes for releasing. 3) Heavy series: type -00 Have four half-holes for tightening screws and two half-tapped holes for releasing... Type and nomenclatures For each type of bushing, there will be different standard shaft sizes for selection. Written in four numbers, eg. 7, the initial two are divided by ten indicating the Maximum bore of the Bushing (in inches). The other two are divided by ten indicating length through bore (in inches). For example, the Maximum bore of the Bushing is.5 inches (.5 x.4mm), length through bore is.7 inches (.7 x.4mm). Written in six numbers, eg. 00, the initial three divided by ten indicating Max. bore of Bushing (in inches), the other three are divided by ten indicating length through bore (in inches). For example, indicates that the Max bore of Bushing is inches ( x.4mm); 00 indicates that length through bore is 0 inches (0 x.4mm). Written in five numbers, the initial three indicates Max, bore of bushing, the other two indicates length through bore, for example, Rating load-bearing capacity See torque capacity parameters for general type in the following table: Bush.No Torque Capacity Bush.No Torque Capacity bf.in N.m Lbf.in N.m 008, ,800 5,0 08, ,0 8,7 5 3,0 7 0,000,0 35 3, ,000 4,0,000 3,900 4, ,000 47,000 7, ,000 5,0 7,0, ,000 98,0,000, 00,5,000 7,000 bf.in=0.3n.m 5

3 BTL TPER BUSHING INSTLLTION INSTRUCTIONS TO SSEMBLE.Clean and degrease the bore and taper surfaces of the bush and the tapered bore of the pulley. Insert the bush into the pulley hub and line up holes (half thread holes must line up with half unloading holes).lightly oil the grub screws (bush size 008 to )or the cap screws (bush size to )and screw them in, do not tighten them yet. BUSH SCREW SCREW NO TIGHTENING TORQUES(Nm) QUNTITY SIZE 008 /4" /8" 5 3/8" 35 3/8" 3 7/6" 7 48 /" " /" 3 " 9 3 " 7 3 " The BTL taper bushing are registered patent products. ny producton and sale should be authorised and permitted. Special Note BTL bushing are made of GG cast iron. We can also offer other materials according to customers' requirements. We can do surface coating according to the customers' requirements.*(such as painting, black phosphating,black oxidizing and so on) 3.Clean and degrease the shaft.fit pulley with taper bush on shaft and locate in desired position. 4.When using a key it should firstly be fitted in the shaft Keyway. There should be a top clearance between the key and the keyway in the bore. 5.Using a hexagon socket wrench (DIN9) gradually tighten the grub cap screws in accordance with the torques as listed in the schedule of screw tightening torques. 6.When the drive has been operating under a load for a short period (half to one hour) check and ensure that the screws remain at the appropriate tightening torque. 7.In order to eliminate the ingress of dirt, fill all empty holes with grease. REMOVL.Loosen and remove all the screws and place them in holes of bushing..tighten the screws alternatively till the hub's grip on bushing is loose. The inner bore of bushing can be slid on the shaft. 3.Remove the bushing from the shaft. Each part is individualy boxed. BTL bushings are inserted with high quality screws made in Japan. 6

4 B Position of screw to tighten bushing For removing from shaft Bushing half of hole threaded Hub half of hole not theaded 55 0 D G G L M 8 o taper included angle F Set screw for tightening on shaft Hub half of hole threaded Bushing half of hole not threaded 3535 thru sizes B Position of screw to tighten bushing For removing from shaft Bushing half of hole threaded Hub half of hole not theaded D (Bon Cirde) G G F Socket thread set screws L M 8 o taper included angle For tightenng on shaft Hub half of hole threaded Bushing half of hole not threaded Dimensions for 008 thru BTL Taper Bushings BUSH NO B D Set Screws /64 /4x/ /64 /4x/ 3/8x 5 / 3/8x 3/8x /4 /8 3/8x /4 / /8 3/8x /4 7/6x 7 3 3/8 3 /4 /x 3 3/8 / 3 /4 /x 4 /4 4 x /4 4 /4 3 4 x /4 Dimensions for 008 thru BTL Taper Bushings BUSH NO B D Set Screws G / 4.83 /x / o x o 6 3/8 4 / 6.3 x o x /4 37 o Two screws required Three screws required W D Ref:Bore+D MM Bore Key way dimensions conform to ISO standard Depth measured at centerline 7

5 DIN 6885 Bush Bore Bushing No Keyway 0 3x. 4x x x.00 8x. 0 3x. 4x x x3. 8x.00 4x x x3. 0x3. 4x x x3. 0x3. 4 5x x3. 0x3. 35 Bush Bore Bushing No Keyway 4 6 5x x x3. x3. x. 4 5x x x3. x3. x x x3. x x3.80 Bush Bore Bushing No Keyway 8x x3. x x x4. 7 8x4. 8x x3. x x x4. 8x4. KEYWY Bush Bore Bushing No Keyway 8x x3. x x x4. 8x4. x x x3. x x x4. 8x4. x JIS B -976 UNI GB Bush Bore Bushing Bush Bore Bushing No 3535 Keyway 35 0x3. x x x4. 8x4. 75 x x5. 90 x5. x x x4. 8x4. 75 x x5. 90 x x6. No Keyway 55 6x4. 8x4. 75 x x x x6. 0 8x4. x x x x x7. 8

6 KEYWY B B.S.46:Part:958 KEYS ND KEYWYS Bush Bore Keyway Bush Bore Keyway Bush Bore Keyway Bush Bore Keyway Bush Bore Keyway Bush Bore No WIDTH DEPTH No WIDTH DEPTH No WIDTH DEPTH No WIDTH DEPTH No WIDTH DEPTH No / / / /6 9/6 9/6 5/ / / / /6 /6 /8 7/ /6 3/ / 3/6 3/6 / /6 5/6 / /6 5/6 3/ /6 7/6 / /6 /8 / 5/ /6 / /6 9/6 3/6 / / /6 /4 5/6 /6 3/6 5/6 3/ /4 08 3/6 3/ /6 3/6 5/ /6 / / /6 / 9/6 5/ /6 9/6 / /6 /6 / /8 / /8 /6 / /6 3/6 3/ / / /6 5/6 5/6 5/ /6 3/8 3 3/6 /6 7/6 3 /8 3/ /8 / 3 3/ /6 3/6 3 / /6 /4 / /6 /6 5/6 3 3/ /6 /8 3/8 3/6 3 7/ /8 3/6 7/ / /6 /4 / 5/6 -/4 5/ / / /8 5/ / /6 7/6 / /8 /8 / /6 9/6 3/ / /4 /4 3/6 / /8 5/6 5/ /6 7/ / / / 7/6 /8 /6 / 3/6 /6 / /6 / /8 3/ / / /6 /6 7/6 /4 5/6 / / /6 3/6 9/6 / /6 /8 /8 5/ /6 3/6 3/ /6 /4 5/6 /4 5/6 /6 /8 5/6 3 3/8 3/ /6 3 /8 5/6 7/6 7/6 /4 3 3/ / / 5/6 3 / /6 9/6 3/8 3 3/8 / /6 3 7/6 3/6 /6 / 3 / /4 3 5/6 3/6 / / /8 3 5/ / / /6. 0. Keyway WIDTH DEPTH 5/ /6 3/ / /6 3 3 /8 3 3/6 3 /4 3 3/8 3 7/ / /6 4 4 /8 4 3/ /4 4 3/8 4 7/ / 4 7/ / / / /6 4 4 /4 4 3/ /6 4 / 4 4 5/

7 TPER BUSHING DIMENSIONS(Cont.) thru 00 Sizes 55 FOR BUSHING REMOVL F HEX HED CP SCREWS FOR BUSHING INSTLLTION 00 B L M FOR BUSHING REMOVL 80 (HUB DIM) E (BOLT CIRCLE) D 8 C SECTION - 8 TPER INCLUDED NGLE F HEX HED CP SCREWS FOR BUSHING INSTLLTION Dimensions for thru 00 BTL Taper Bushings Bush.No. B D Socket Head Cap Screws E L M 9 / /4x3 / 6 4 3/8 0 / /4x3 / 7 4 3/8 80 /4 6 / 4- /4x3 / 8 4 3/ / 4 / 4- /x4 /4 5 3/ / /x4 /4 4 /4 5 3/8 Dimensions fortper Bushings Metric.Inches Bore Bush.No inches bore metric bore Min. Max. Min. Max. 4 7/ / / n instruction sheet is packed into each bushing box Bore and keyway dimensions conform to ISO standard recommendation R773. for "free" fit 0

8 It should be noted that bushing's load bearing capacity is related to screw tightening torque and shaft size. In this catalogue the related tightening torque has been given, The load bearingcapacity raised as the shaft size enlarged. Please consult with the factory if more detailed information needed.. Flange type (QD bushing).. Dimension series: QD Bushings can be divided into two series according to whether they can be reversed mounting or not. ) reversable mounting series: type J - J There are three screws and three bores on the flange. ) non-reversable mounting series: type M - W. Only with four tapped holes on the flange, without un-tapped holes... Type and load -bearing capacity ccording to the dimensions and load bearing capacity, QD Bushings have thirteen specifications, see torque capacity and related screw tightening torque in the table below:. Selection fter selecting bushing type according to bushings' features under different usage condition, the selection to the type mainly depends on the torque and working torque on shaft: T=6N/n (lbf.in) Where: N-transmission torque (house); n-shaft revolutions per minute(rpm) calculation torque TO=KT,K-loading coefficient loading force. See loading coefficient K for bushing connection below: K Load type.0 light loading start,work even.5 light loading start,work uneven.0 medium loading start,work even or uneven.5 light or heavy loading start,medium shock 3.0 lighty or heavy loading start,heavy shock or rotating When using To select Bushing type, it should comply with TH < TO, TH -Bushing torque capacity, can be got from the given table. Bush.No Torque Capacity Screw Tightening Torque lbf.in N.m lbf.in N.m J, SH 3, SDS 5, SK 7, SF,000,3 3.8 E,000, F,000 3, J,000 5,090,6 83 M 85,000 9,0,0 5 N,000 7,000 3,0 8 P 0,000,0 5,0 W 375,000,0 7,0 84 S 6,000,0 9,000,0