As the diameter of wheel increases, the pushing pulling efforts are reduced proportionately. Try to use higher diameter wheels as far as possible.Floor conditions & bearing in the wheel remaining the same, pushing pulling efforts depends very much on the material of the wheel. Rubber being soft, rubber wheels get compressed under load & due to high coefficient of friction needs more pulling pushing efforts. As against this, cast iron being very hard & low coefficient of friction, pushing pulling efforts are minimum n cast of cast iron wheel.
Type of Bearing used in wheel :- If we consider the pushing pulling efforts required are moderate for wheels with PLB & SIB, pushing pulling efforts are less for wheels with NRB & minimum for wheels with BB. However periodic cleaning & greasing of bearings must be ensured.Rubber & PU wheels are soft & have low noise level. PP, NYL & UHMW-PE wheels have comparatively higher noise level. CI wheels have very high noise level. If very low noise level is essential, you may check for Rubber or PU wheels with higher diameter.

UHMW-PE wheels are moulded on hydraulic compression moulding presses under strict temperature & pressure conditions & extended curing time for avoiding development of blow holes in the mass of the wheel.

Polymer wheels are manufactured in-house on microprocessor controlled fully automatic injection moulding machines. Consistent quality of wheel is ensured as the temperature of material, pressure on the moulds, cooling time etc. are critically controlled by full automation. Raw materials of proper grades are selected for achieving required hardness & abrasion resistance.

These are bare cast iron wheels made from good quality graded casting, machinable & free from blow holes. These wheels have very high load carrying capacity & are suitable for high temperature applications like ovens, foundries etc. The only disadvantage of CI wheels is that they damage the costly floor surfaces.
Hardness of Casting : ( 175 10 ) BHN,
Grade of Casting : FG200 as per IS-210,
Maximum Working Temperature : 170C.

The wheel consists of Solid Rubber Tyre clamped between two presses steel drums with nuts & bolts. Tyre is made from good quality rubber compound to ensure long life & good cushioning effect. The tyre, when worn out, can be replaced easily on sight.
Hardness of Rubber : ( 85 5 ) on Shore A scale,
Maximum Working Temperature : 500C.

These are manufactured from virgin Ultra High Molecular Weight Poly Ethylene (UHME-PE) powder, white in colour. These wheels are light in weight but have very high load carrying capacity, higher wear resistance as well as high impact strength. Therefore the question of wheel cracking under load or impact load does not arise, as it happens in case of nylon or fiber wheels. The material has got very low coefficient of friction. Therefore, pulling or pushing force required is considerably less. The material does not have any effect of chemicals or acids. Though the UHMW wheels can carry heavy loads, the material is not hard like cast iron. Therefore UHMW wheels do not damage the flooring. As the UHMW material has got very low coefficient of friction, ball bearing has tendency to rotate in the step bore. To avoid this, metal insert is pressed in the wheel. The metal insert has step bore suitable for ball bearing.

As the diameter of wheel increases, the pushing pulling efforts are reduced proportionately. Try to use higher diameter wheels as far as possible.Floor conditions & bearing in the wheel remaining the same, pushing pulling efforts depends very much on the material of the wheel. Rubber being soft, rubber wheels get compressed under load & due to high coefficient of friction needs more pulling pushing efforts. As against this, cast iron being very hard & low coefficient of friction, pushing pulling efforts are minimum n cast of cast iron wheel.
Type of Bearing used in wheel :- If we consider the pushing pulling efforts required are moderate for wheels with PLB & SIB, pushing pulling efforts are less for wheels with NRB & minimum for wheels with BB. However periodic cleaning & greasing of bearings must be ensured.Rubber & PU wheels are soft & have low noise level. PP, NYL & UHMW-PE wheels have comparatively higher noise level. CI wheels have very high noise level. If very low noise level is essential, you may check for Rubber or PU wheels with higher diameter.

UHMW-PE wheels are moulded on hydraulic compression moulding presses under strict temperature & pressure conditions & extended curing time for avoiding development of blow holes in the mass of the wheel.

Polymer wheels are manufactured in-house on microprocessor controlled fully automatic injection moulding machines. Consistent quality of wheel is ensured as the temperature of material, pressure on the moulds, cooling time etc. are critically controlled by full automation. Raw materials of proper grades are selected for achieving required hardness & abrasion resistance.

These are bare cast iron wheels made from good quality graded casting, machinable & free from blow holes. These wheels have very high load carrying capacity & are suitable for high temperature applications like ovens, foundries etc. The only disadvantage of CI wheels is that they damage the costly floor surfaces.
Hardness of Casting : ( 175 10 ) BHN,
Grade of Casting : FG200 as per IS-210,
Maximum Working Temperature : 170C.

The wheel consists of Solid Rubber Tyre clamped between two presses steel drums with nuts & bolts. Tyre is made from good quality rubber compound to ensure long life & good cushioning effect. The tyre, when worn out, can be replaced easily on sight.
Hardness of Rubber : ( 85 5 ) on Shore A scale,
Maximum Working Temperature : 500C.

These are manufactured from virgin Ultra High Molecular Weight Poly Ethylene (UHME-PE) powder, white in colour. These wheels are light in weight but have very high load carrying capacity, higher wear resistance as well as high impact strength. Therefore the question of wheel cracking under load or impact load does not arise, as it happens in case of nylon or fiber wheels. The material has got very low coefficient of friction. Therefore, pulling or pushing force required is considerably less. The material does not have any effect of chemicals or acids. Though the UHMW wheels can carry heavy loads, the material is not hard like cast iron. Therefore UHMW wheels do not damage the flooring. As the UHMW material has got very low coefficient of friction, ball bearing has tendency to rotate in the step bore. To avoid this, metal insert is pressed in the wheel. The metal insert has step bore suitable for ball bearing.