Pullers

CeramicTile Methods and Materials Standards Association c/o H. B. Puller Co. 315 South Hicks Road Palatine, lU. 60067... 

M.. Puller, Industrial Uses of Inorganic Tin Chemicals, ITRI Pubhcation 499, International Tin Research Institute, Middlesex, UK, 1975. 

A claw-type puller, as shown in Figure 10.2, with adjustable jaws must be used when pulling out the bearing or the pulley from its seat. The claws are so set that they do not bear against the outer ring of the bearing while... 

The hydraulieally tensioned, radial-fit bolt (Figure 6-32) replaees the traditional turbine shaft eoupling bolt and is reusable. The main body of the bolt is threaded at eaeh end and has a slight taper on the eenter seetion, whieh engages with the similarly internally tapered sleeve and the two nuts. The bolt is taper-bored at eaeh end to aeeept the puller that is part of the hydraulie tensioning system. 

To install the bolt body, it is inserted in the hole through the two flanges with the sleeve in the elearanee position. Hydraulie pressure pushes the sleeve into the final (interferenee) fitted position, and the puller draws the bolt baek into the sleeve. The nut is fitted at one end and the bolt is hydraulieally tensioned with the other nut. The entire proeess takes about 15 min per bolt. 

If the hub removal is necessary, such as required on compressor with non-split seals, a tapered hub fit on the shaft should be used. The removable hubs should have tapped puller holes. The shaft should be keyless with the preferred method of installation and removal by use of hydraulic dilation. Two injection ports 180° apart should be used whether injection is through the shaft or through the hub. Shrink fits should be 2 to 2.5 mil/in. of diameter. API 671 rcL ommends 1,5 mil/in. minimum, but experience indicates the heavier shrink may be required. For the juncture rating calculation, a f ra lion value of. 12 is recommended. 

BR — Barometric Refrigeration Unit G — Compressor CP — Gar Puller GT— Cooling Tower GV — Conveyor D — Drum or tank DS — Desuperheater... 

In this Fig. 8-41 view (a) the feeder-roll speed to puller-roll speed ratio can be set, such as 1 4, and simultaneously the ratio of width can be set as 1 4. The machined direction ratio is usually accomplished prior to the plastic s entering the temperature controlled oven that contains the tenter frame, by having it move around heat-controlled rolls where the rotational speed of the rolls increases from one roll to the next. View (b) is a schematic of the drawdown phenomenon with swell to produce orientation in the machined (longitudinal) direction. 

Since the mass-transfer coefficient at a micropipette is inversely proportional to its radius, the smaller the pipette the faster heterogeneous rate constants can be measured. Micrometer-sized pipettes are too large to probe rapid CT reactions at the ITIES. Such measurements require smaller (nm-sized) pipettes. Nanopipettes are also potentially useful as SECM tips (see Section IV.D) because they can greatly improve spatial resolution of that technique. The fabrication of nanopipettes was made possible by the use of a micro-processor-controlled laser pipette puller capable of puling quartz capillaries [26]. Using this technique, Wei et al. produced nanopipettes as small as 20 nm tip radius and employed them in amperometric experiments [9]. 

User s Manual for Micropipette Puller Model P-2000. Sutter Instruments, Novato, CA, 1998. M. V. Mirkin and A. J. Bard. Anal. Chem. 64 2293 (1992). 

Pull a glass pipette tip (10 pL Drummond Microdispenser 100 replacement tubes, Broomall, PA, Cat. 3-000-210-G) using a one-stage magnetic puller with a heating element. 

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