Assemblies : puller Head

puller Head

Description

Holds glass pipette tube inside filament loop. When filament gets hot, glass melts , puller fixer (clamp dog) drops , sliding down puller posts, thus drawing fine point on pipette tube.

A 2-loop filament made from 35mm of 0.25mm dia. Pt90-Ir10 wire formed on a 1.8 mm diameter mandrel will glow orange-hot when the current reaches 3.5 Amperes and the voltage drop is 1.45 Volts. This power gives sufficient heat to melt glass and form a pipette tip.

Type

Assembly

Pictures

puller filament holder

puller head complete

Pipette puller head

puller fixer clamp

6-32 socket-head screw, plastic thumb-screw knob, fixer clamp. Round brass nut ring is threaded onto screw and glued in place with epoxy so that unscrewing knob will pull fixer clamp away from Slider or Top piece.

puller fixer clamp

Parents

· Pipette Puller

Parts

Name	Manufacturer	Vendor	Required	Cost
Knob	for #6 capScrew	McMaster Carr	5	$0.12
Platinum wire	0.3 mm	Alfa Aesar	4 cm	$3.60
puller Bottom	custom shop	Various machine shops	1	$50.00
Puller Filament Mount	custom shop	Various machine shops	1	$0.00
puller Fixer	custom shop	Various machine shops	1	$33.00
puller Holder	custom shop	Various machine shops	1	$83.00
puller Post	custom shop	Various machine shops	2	$33.00
puller Slider	custom shop	Various machine shops	1	$66.00
puller Top	custom shop	Various machine shops	1	$66.00
Screw, SS Allen-cap	6-32x3/4	McMaster Carr	5	$0.06
Screw, SS Pan-Head	6-32x1/4	McMaster Carr	4	$0.05
Spacer, Brass	Threaded 6-32 x 1/2"	McMaster Carr	2	$0.56
Washer, Fender	5/8" o.d. for #8 screws	McMaster Carr	2	$0.08
Estimated cost: $380.81

List all the parts for "puller Head"

last changed

2023/08/05 00:43