Conductive (anti static)

Conductive (anti static)

Conductive (anti static)

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Background:

Our standard wheels and castors have a temperature range of 5°C to 60°C (41°C to 140°F). Within this range our products work normally for their full working life. For applications with temperatures outside this range we make specialised high temperature wheels designed to withstand temperatures of baking ovens.

 

High temperature use:

The customer must specify the temperature and type of application before ordering to ensure that the appropriate wheel type is selected. As temperatures increase wheels become weaker and this lowers the load capacity. In static (non-moving) applications with sustained high temperatures over long periods of time the material will begin to deteriorate, which shortens the working life of the wheel. Fallshaw make three different wheel types designed specifically for use in high temperature environments. These specialised wheels use standard lithium complex grease (STABUTHERM® GH 461) which has excellent water resistance (24hrs at 90°C), bearing retention and long life.


1) Glass filled Nylon 150 – 210°C (300 to 410°F):

The best choice for Hospitality based applications such as ‘food baking’ ovens. It can withstand sustained high temperatures and is gentle and quiet on most floor surfaces. Fibreglass reinforced nylon wheels are the preferred wheel for extended periods of up to 210°C (410°F) (assuming most of their life is spent outside the oven), and for short periods up to 230°C (446°F).

 

2) Phenolic 100 – 300°C (570°F)

Phenolic is more brittle than Glass Filled Nylon and it has a shorter life cycle but can go up to very high temperatures. Phenolic is a good choice for light duty Industrial applications with very high temperatures such as ovens used for curing paint. The load capacity decreases from 125kg at 100°C (212°F) to 40kg at 300°C (570°F) therefore it is very important to ensure that the load capacity of the trolley fits within the appropriate temperature and load capacity. Phenolic wheels (with special inorganic fillers and PTFE bushes) are preferred for extended periods up to 280°C (536°F) assuming most of their life is spent outside the oven and for short periods up to 300°C (572°F). These have a thick cross section, but are more brittle than either nylon or ordinary grades of Phenolic. WARNING: Phenolic wheels are not suitable for medium duty applications or applications where wheels are subjected to impact such as when a trolley is rolled down steps.

 

3) Cast Iron 200 – 400°C (390 – 725°F):

The best choice for Industrial based applications such as ‘paint curing’ ovens and also for use in sustained high temperature environments. It can withstand extreme high temperatures as well as higher load capacities than all other wheel types. Cast Iron wheels do not have bearings. They have a plain bore fitted with an axle spacer that is lubricated with high temperature grease. This grease can be used up to 230°C (446°F) for long periods. For temperatures that exceed 230°C (446°F) a more exotic grease is required. The Production Manager must be notified of this prior to placing the order and the customers required temperature noted on the picking slip once the order is placed. For sustained high temperature use, we offer a range of cast iron wheeled castors used with high temperature grease. WARNING: Cast Iron is heavy, noisy and may damage concrete floors and other floor surfaces.

Baking Ovens – Food & Paint

In a commercial context, oven baking is a highly repetitive process which means that our wheels are used in baking ovens again and again and again. From the table below you see that in a food baking oven we get temperatures from around 150°C up to 260°C with (occasional) water vapour present.


BAKING TEMPERATURE & TIMES (TYPICAL)

Type of food

Degrees °C

Minutes

Macaroon

150

20

Madeira Cake

175

55

Rye Bread

185

50

Sponges

190

15

Farm Bread

205

40 moist

Crusty Rolls

220

20 moist

Pasties

230

15

Cinnamon Log

245

10

Apricot Slice

260

30


OVEN THERMOSTAT DESCRIPTIONS (TYPICAL)

Approx Thermostat Setting °C

Description

100

Cool

120

Very slow

150

Slow

160

Moderately slow

180

Moderate

190

Moderately hot

200

Hot

230

Very Hot

Over 230

Extremely hot


Low temperature use:

Below 5°C you must specify temperature of use at the time of ordering. Below 5°C (41°F) wheels begin to stiffen quickly, and will soon freeze the bearings so that neither the castor swivels nor the wheels revolve. If specified at the time of ordering, we use special aeronautical grease which is a synthetic oil with a microgel thickener. This is compounded for use down to -30°C (-86°F), and will need to be refreshed every 6 – 12 months, but will continue to work effectively in chilling rooms, freezing stores and outdoor winter use in northern countries where ordinary greases would be useless. As the temperature becomes lower, the softer rubber and polyurethane treads on our wheels become less elastic. For example, the polyurethane used on the ‘H’ series (i.e HUR100) slowly stiffens from 20°C (68°F) down to -20°C (-68°F), but then rapidly stiffens until at -50°C (-122°F) it becomes brittle. As temperature goes below 5°C (41°F), nylon can become brittle (particularly if it is kept for long periods in the very dry air in freezing rooms). At such times we recommend fibreglass reinforced wheel, which can be used down to -30°C (-86°F).



High/Low Temperature
M series

  • Wheel and castors for extreme temperatures
  • See M page for castor dimensions
  • Fitting option information
  • 1 year warranty

Note:

M series have 1/2 I.D bore reduced to 8mm with axle spacer

 

Bearing Type

 

Load Capacity

kg / lb

 

Diameter x Tread Width

mm / inches

 

Hub Width x Bore

mm / inches

Fork Options
Fork Type

 


Fork Type

 

High Temp grease and no seal
/ or Low Temp grease with seal

Plate
Swivel
Bolt Hole
Swivel
Plate
Fixed
Wheel Only /MZP Iso plate
/MZPN NA Plate
/MZH /MZF Iso plate
/MZFN NA Plate
Nylon glass reinforced

 

(lighter hub)

Plain 70kg @ 150°C

 

155lb @ 300°F

75×32

 

3×11/4

41×12

 

15/8“x1/2

MHH75 High Temp MHH75/MZPHT

 

MHH75/MZPNHT

MHH75/MZHHT MHH75/MZFHT

 

MHH75/MZFNHT

Low Temp MHH75/MZPLT

 

MHH75/MZPNLT

MHH75/MZHLT MHH75/MZF

 

MHH75/MZFN

Plain 80kg @ 150°C

 

175lb @ 300°F

100×32

 

4×11/4

41×12

 

15/8“x1/2

MHH100 High Temp MHH100/MZPHT

 

MHH100/MZPNHT

MHH100/MZHHT MHH100/MZFHT

 

MHH100/MZFNHT

Low Temp MHH100/MZPLT

 

MHH100/MZPNLT

MHH100/MZHLT MHH100/MZF

 

MHH100/MZFN

Cast Iron
(high temp)
Plain 100kg @ 200°C

 

220lb @ 390°F

75×28

 

3×11/10″

41×12

 

15/8“x1/2

DCI75 High Temp DCI75/MZPHT

 

DCI75/MZPNHT

DCI75/MZHHT DCI75/MZFHT

 

DCI75/MZFNHT

Phenolic
(high temp)
PTFE

 

(Teflon) Plain

125kg @ 100°C

 

275lb @ 212°F

100kg @ 250°C

220lb @ 480°F

40kg @ 300°C

90lb @ 570°F

100×35

 

4×13/8

41×12

 

15/8“x1/2

MKT100 High Temp MKT100/MZPHT

 

MKT100/MZPNHT

MKT100/MZHHT MKT100/MZFHT

 

MKT100/MZFNHT

High/low temperature
J series

  • Wheel and castors for extreme temperatures
  • See J Series for fork and mounting information
  • Fitting option information
  • 1 year warranty

Note:

J series wheels have 20mm I.D bore reduced to 10mm with axle spacer


 

Bearing Type

 

Load Capacity

kg / lb

 

Diameter x Tread Width

mm / inches

 

Hub Width x Bore

mm / inches

Fork Options
Fork Type

 


Fork Swivel Librication

 

High Temperature Grease and No seal
/ or Low Temperature Grease

Plate
Swivel
Bolt Hole
Swivel
Plate
Fixed
Wheel Only /JZP /JZH /JZF
Nylon glass reinforced

 

(heavier hub)

Plain 100kg @ 210°C

 

220lb @ 410°F

100×32

 

4×11/4

45×20

 

13/4“x20mm

JHH100 High Temp JHH100/JZPHT JHH100/JZHHT JHH100/JZFHT
Low Temp JHH100/JZPLT JHH100/JZHLT JHH100/JZF
Cast Iron

 

(high temp)

Plain 230kg @ 400°C

 

505lb @ 952°F

100×38

 

4×11/2

45×20

 

13/4“x20mm

JCI100 High Temp JCI100/JZPHT JCI100/JZHHT JCI100/JZFHT
Low Temp JCI100/JZPLT JCI100/JZHLT JCI100/JZF

High/Low Temperature
O series

    • Wheels and castors for extreme temperatures
    • See O Series for castor dimensions
    • Fitting option information
    • 1 year warranty

Note:

O series wheels have 20mm I.D bore reduced to


 

Bearing Type

 

Load Capacity

kg / lb

 

Diameter x Tread Width

mm / inches

 

Hub Width x Bore

mm / inches

Fork Options
Fork Type

 


Fork Type

 

High Temp grease and no seal
/ or Low Temp grease with seal

Plate
Swivel
Plate
Fixed
Wheel Only /OZP /OZF
Nylon glass reinforced

 

(heavier hub)

Plain 200kg @ 210°C

 

440lb @ 410°F

150×40

 

6×19/16

60×20

 

23/8“x20mm

OHH150 High Temp OHH150/OZPHT
ISO plate OHH150/OZPNHT
NA plate Information
OHH150/OZFHT
ISO plate OHH150/OZFNHT
NA plateInformation
Low Temp OHH150/OZPLT
ISO plate OHH150/OZPNLT
NA plate Information
OHH150/OZF
ISO plate OHH150/OZFN
NA plate Information
Cast Iron

 

(high temp)

Plain 250kg @ 400°C

 

550lb @ 725°F

150×50

 

6X2″

60×20

 

23/8“x20mm

WCI150 High Temp WCI150/OZPHT
ISO plate WCI150/OZPNHT
NA plate Information
WCI150/OZFHT
ISO plate WCI150/OZFNHT
NA plate Information
Low Temp WCI150/OZPLT
ISO plate WCI150/OZPNLT
NA plate Information
WCI150/OZF
ISO plate WCI150/OZFN
NA plate Information