Cranks

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GENERAL OVERVIEW

IPS Ceramics’ T-Cranks, Y-Cranks and Web Cranks are used to support plates, flatware and holloware during decoration and glost firing. Easily stacked to maximise kiln-fill, our T-Cranks, Y-Cranks and Web Cranks contact the ware at only certain points of the foot, minimising the risk of plucking or sticking.

T-Cranks and Y-Cranks are easier to load and unload without separating the stack. The Web Cranks can be lighter weight and allow for better heat distribution.

Designed to provide maximum support using minimal material, IPS Ceramics’ cordierite cranks provide a low cost, low weight, low energy solution to supporting ware through lower temperature firings.

TECHNICAL INFORMATION

T-, Y- and Web Cranks
General Information
Type	Standard	Glaze Resistant	Cast (Standard)	Cast (Enhanced)	Cast (Thermal Shock Resistant)
Max Usage Temp.	1300 °C / 2372 °F	1250 °C / 2282 °F	1250 °C / 2282 °F	1250 °C / 2282 °F	1250 °C / 2282 °F
Typical Physical Properties
Bulk Density	1.85 g/cm³	2.20 g/cm³	1.90 g/cm³	1.90 g/cm³	1.80 g/cm³
Apparent Porosity	28 %	25 %	27 %	29 %	32 %
MoR @ 20°C	15 MPa	14 MPa	15 MPa	30 MPa	16 MPa
MoR @ 1250°C	13 MPa	12 MPa	15 MPa	25 MPa	15 MPa
CTE 20 – 1000 °C	2.4 x10^-6/K	2.4 x10^-6/K	2.5 x10^-6/K	2.6 x10^-6/K	1.8 x10^-6/K
Specific Heat @ 20°C	1.0 kJ/kg.K	1.2 kJ/kg.K	1.0 kJ/kg.K	1.0 kJ/kg.K	1.0 kJ/kg.K
Typical Chemical Analysis
Al₂O₃	37 %	25 %	42 %	38 %	44 %
SiO₂	50 %	45 %	48 %	45 %	48 %
MgO	8 %	8.5 %	7.5 %	8 %	10 %