PRECISION BALLS

True point (UK) Ltd has an extensive range of Precision Balls in a wide range of materials in stock at all times.

 Please see below for the materials that are available.

MATERIAL

TYPICAL USES

PROPERTIES SIZES AVAILABLE
Nylon Balls Used in Valves. Light duty bearings. flow meters etc.

Used in applications where toughness, abrasion resistance and light weight are more important than hardness.

2 to 50mm Dia'.
PTFE (Teflon) Balls

Typically used in valves where a high corrosion resistance is needed.

Electrically non-conductive.  An extremely high coefficient of friction. Good strength at low temp'.

2 to 50mm Dia'.
Acetal Balls  

A hardwearing pure white plastic – will drill and tap well. An excellent bearing material with high mechanical strength and rigidity

2-50mm Dia'.
Clear Acrylic Balls     1.5-150mm Dia'.
Cellulose Acetate Balls  

 

 Specific Gravity of ~1.36g/cc.

1-6mm Dia;.
Polycarbonate Balls     3-36mm Dia'.
Polyethylene (LD/HD) Balls     3.4-25mm Dia'.
Polystyrene Balls

Packaging, Arts & Crafts, Thermal insulation etc.

  1.5-22mm Dia'.
Nitrile Rubber Buna N Balls   Shock absorbing 25-70mm Dia'.
Fluoroelastomer Balls     3-70mm Dia'.
Polyurethane Balls     3-70mm Dia'.
Clear Hollow, Pull-Apart Balls Toys, Display packaging etc.   40-400mm Dia'.
Thermoset Resin/Phenolic Balls     15-200mm Dia'.
Polypropylene Balls

Used in Flow meters. Fluid level gauges. Non-return Valves. etc.

Low specific weight, good abrasive resistance and very low water absorption.

6 to 100mm Dia'.

 

Plastics RESISTANCE TO CHEMICALS

The two most chemically resistant materials from our range are PTFE and a fluoroelastomer (a Viton® type material). Fluoroelastomers are one of the most heat and fluid resistant synthetic rubbers developed, whilst PTFE is attacked by so few chemicals that it is more practical to describe the exceptions.

It is important to distinguish between strictly chemical reactions and physical reactions such as absorption which may be inter-related and which may affect a particular application.

The suitability of plastic balls for specific applications is best judged from tests where the balls are subjected to the mechanical stresses, thermal effects and chemical attack likely to occur under working conditions.

Technical advice is freely available, but since we have no control over actual operating conditions we do not guarantee the success of our plastic balls for any particular application and the final choice of material is at the customer's discretion.

 

other materials

Sapphire (Ruby) Balls

Used in Flow Meters,              Valves and as wear points on instruments. etc.

Corrosion resistant, Electrical non-conductive, Non-magnetic, Extreme hardness, Light weight, Resistant to extreme high temp'.

0.4 to12mm Dia'.
Ceramic Balls Used in Check Valves where heat, corrosion  and abrasive resistance is needed. etc.

Extremely hard, Abrasion resistant, Furnace temp' tolerant,

2.0 to 13mm Dia'.
     Glass Balls        (ground & lapped)

Used in Non-Return Valves, Flowmeters and Insulators.

Corrosion resistant. Not suitable where thermal or mechanical shock is likely.

2 to 20mm Dia'.
Tungsten Carbide Balls

Used in Precision Hydraulic Valves. High Load Bearing.                                        Ball Screws and Linear Bearings.            Master Ball Gauges. etc.

Extremely hard and wear resistant. Slightly magnetic.

1.0 to 25mm Dia'.
Stainless Steel Balls (various mat'l spec's)

Typically used in non-corrosive bearings. Detents, Pump and Non-Return Valves.

Magnetic or non-magnetic available. Good resistance to corrosion. Available in various toughness and hardness spec's.

0.5 to 100mm Dia'.
Brass & Phosphor Bronze Balls

Used in low cost non-return valves and associated equipment.

It is tough, non-magnetic, and have good electrical conductivity.

1 to 25mm Dia'.
Aluminium  and Dural' Balls

Used where light weight, and resistance to certain types of corrosion is important. Also a good thermal & electrical conductor.

Not recommended for most alkalies, chlorides and oxides. Can cause galvanic action when in contact with an electrolyte.

2 to 25mm Dia'.
Hastelloy Balls

Used in 'Check Valves' and instrumentation where its non-corrosion and wear properties are important.

Has excellent corrosion and wear resistance.

3 to 50mm Dia'.
Cobalt Balls Alloy  No 2

Used in bearings and valves where hardness and resistance to abrasion and corrosion are important in elevated temperatures.

Other grades of Cobalt are available.

3 to 19mm Dia'.
Monel and 'K' Monel Balls

Used in pumps valves and instrumentation in the marine, chemical and pharmaceutical industries. etc.

A nickel-copper alloy  ideal where high strength, toughness and corrosion resistance is required. It is also non-magnetic. 'K' Monel has even better spec's.

3 to 50mm Dia'.
Imperial sizes also available. More details on request. 

Larger sizes and also hollow balls available to order.

Table of Grades for Precision Balls, please click here to see table.

Other materials also available: -

Titanium Carbide, Silicon Carbide, Polycarbonate Resin, Acetal Resin, Tantalum, Carpenter 20 Cb-3,
M-50 High Speed Steel, Cubic Zirconia, Yag, Silicon,Crystal Quartz, Silicon Nitride,Optical Quality Glass, etc.

Acetal, PTFE, Zytel® &Vespel® are registered trademarks of DuPont. Torlon® is a registered trademark of Amoco Polymers Inc. TPX® is a registered trademark of Mitsui Chemicals America Inc. PEEK™ is a registered trademark of Victrex Plc. Celcon® is a registered trademark of Ticona

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