Used Shaft Furnace for sale (6,686)

Condition: new, Year of construction: 2026, functionality: fully functional, total length: 1,600 mm, total width: 1,225 mm, total height: 1,850 mm, overall weight: 1,470 kg, warranty duration: 12 months, hopper volume: 550 l, rotor diameter: 276 mm, rotational speed (max.): 13 rpm, blade width: 20 mm, power: 7.5 kW (10.20 HP), rotor width: 400 mm, Genox M400 Twin Shaft Shredder, suitable for shredding various types of materials including plastics, wood, packaging materials, metals (copper, hard drives etc), Robust, heavy duty construction with easily replaceable wear parts ensures reliable operation, long service life and low maintenance operation. The machine is equipped with a 7.5kW drive motor and oversized, heavy duty reduction gearbox providing high torque, low speed operation. Ljdpfey Rpulsx Akujrl Blade width and hook configuration can be specified to suit the specific application and output size requirements. The shredding blades and spacers are manufactured from heat treated, high quality, precision ground specialist steels to ensure long life, shred quality and minimal operational costs.

Condition: new, Year of construction: 2026, functionality: fully functional, total length: 5,150 mm, total width: 2,210 mm, total height: 2,600 mm, overall weight: 11,400 kg, warranty duration: 12 months, hopper volume: 2,000 l, rotor diameter: 515 mm, rotational speed (max.): 15 rpm, rotational speed (min.): 5 rpm, blade width: 50 mm, power: 90 kW (122.37 HP), rotor width: 1,600 mm, Genox X1600 Twin Shaft Shredder, suitable for shredding various types of materials including tyres, metals, plastics, wood, packaging materials, household & construction waste etc. Ledpfjy Rpt Ijx Akuerl Robust, heavy duty construction with easily replaceable wear parts ensures reliable operation, long service life and low maintenance operation. The machine is equipped with twin 45kW (90kW Total Power) drive motors and oversized, heavy duty reduction gearboxes as standard. Providing high torque, low speed operation. The shafts can be started and operated independently which reduces on site power requirements and improves performance. Blade width and hook configuration can be specified to suit the specific application and output size requirements. The shredding blades and spacers are manufactured from heat treated, high quality, precision ground specialist steels to ensure long life, shred quality and minimal operational costs. Segmented blades with replaceable tips are available as an option.

Condition: new, Year of construction: 2026, functionality: fully functional, total length: 2,710 mm, total width: 1,270 mm, total height: 1,850 mm, overall weight: 2,300 kg, warranty duration: 12 months, hopper volume: 750 l, rotor diameter: 276 mm, rotational speed (max.): 14 rpm, blade width: 20 mm, power: 15 kW (20.39 HP), rotor width: 800 mm, Genox M800 Twin Shaft Shredder, suitable for shredding various types of materials including plastics, wood, packaging materials, metals (copper, hard drives etc), Lrjdpsy Rpthjfx Akusl Robust, heavy duty construction with easily replaceable wear parts ensures reliable operation, long service life and low maintenance operation. The machine is equipped with twin 7.5kW (15kW Total Power) drive motors and oversized, heavy duty reduction gearboxes providing high torque, low speed operation. The shafts can be started and operated independently which reduces on site power requirements and improves performance. Blade width and hook configuration can be specified to suit the specific application and output size requirements. The shredding blades and spacers are manufactured from heat treated, high quality, precision ground specialist steels to ensure long life, shred quality and minimal operational costs.

Condition: new, new ! all stainless steel 2 speeds (20 and 40 rpm) 2 mixing directions 3,7 / 4,5 kW inspection gantry safety lid CE-approved Lsdpfey Sz Iyex Akuerl overall dimensions (l x w x h) : ± 1.970 x 1.000 x 1.750 mm (open lid: H: 2.250 mm) infeed height : ± 1.450 mm Suitable for loader with “Easy Connect” dimensions drum : (l x w x h) : ± 1.000 x 765 x 665 mm + Loader for eurobins

Condition: ready for operation (used), Year of construction: 2007, The Vecoplan VAZ 2000 M F-T is a robust heavy-duty single-shaft shredder manufactured in 2007 for industrial recycling applications. Suitable for plastics, films, wood, paper, cardboard, EBS/RDF, and commercial waste. Formerly part of a production line for LDPE PCR film bales; the production line was modernized and rebuilt in 2024. Successful tests for processing used pallets and cardboard cores have been carried out. The processing of wood and cardboard cores is technically unproblematic. The machine condition has been documented by Vecoplan, and the required spare parts for recommissioning have already been ordered. The sale is due to an internal department closure and the associated restructuring of operational processes. Rotor length approx. 2,000 mm, hydraulic ram for uniform material feeding, flipper/airspring counter-knife system for high operational reliability, Torque/HiTorc drive for high torque and energy-efficient operation, replaceable reversible cutting inserts, suitable for both pre-shredding and secondary shredding, final particle sizes depending on screen and material approx. 10–250 mm, high throughput capacity, and robust, maintenance-friendly design. Inspection possible by appointment. Lrodey T Hbbopfx Akuol

Condition: good (used), HEESS Hardening Press with IPSEN Rotary Hearth Furnace. Technical Key Data (Furnace): Process: Carbonitriding Workpieces: Gear components, up to Ø 260 mm, 4.7 kg Throughput: approx. 96 parts/hour Dwell time: approx. 56 min Temperature range: 820–960 °C Max. temperature: 1000 °C Uniformity: ±5 K Atmosphere: Endogas with propane/ammonia C-potential: approx. 0.9 %C Furnace: Ø 3000 mm, usable height 750 mm Energy: electric: 33 kVA natural gas: approx. 19 m³/h HEESS Hardening Press: Pressing force: 300 kN Workpieces: Ø 60–250 mm, height 10–98 mm Cycle/process parameters: Pressing time: 0.1–10 min Pre-cooling time: 0–100 s Quenching medium: up to 300 l/min Handling: Lrjdpfx Akoy Dd Adouel Manipulator + gantry robot (Siemens servo drives)

Condition: used, TECHNICAL DETAILS - Useful dimensions : 400 x 450 x 600 [mm] - Volume of the heating chamber : 96 [dm3] - Max. load : 250 [kg] - Max. temperature : 1400 [°C] - Max. operating temperature : 260 - 1350 [°C] - Maximum convection heating temperature : 750 [°C] - Heating time from 50°C to 1250°C : 60 [min] - Chamber cooling time from 1200°C to 200°C : 2 [min] PUMP UNIT - Mechanical primary pump : Drystar GV160 * Pumping speed : 160 [m3/h] * Power : 7.5 [kW] - Roots-type pump : Edwards EH1200 * Pumping speed : 500 [m3/h] * Power : 3 [kW] - Diffusion pump : Edwards HT16B * Pumping speed : 6.500 [l/s] * Power : 9 [kW] GAS - Cooling gas : Argon or Nitrogen - Power : 90 [kW] Lrsdpfx Aoy T Snmjkuel Water - Min. / max. pressure (inlet) : 2.5 / 3.0 [bars] - Min. / max. pressure (outlet) : 0 / 0.5 - Flow rate for heat exchanger during cooling phase : 400 [lpm] - Furnace chamber flow rate : 200 [lpm] - Max. inlet temperature : 30 [°C] - Max. inlet temperature (DP) : 25 [°C] POWER SUPPLY - Supply voltage : 400 [V] - Total installed power : 120 [kVA] WEIGHT & DIMENSIONS - Machine floor space : 4.682 x 4.356 [mm] - Machine height : 3.242 [mm] - Machine weight : 5000 [kg] EQUIPMENT - CNC : Siemens S7

Condition: used, TECHNICAL DETAILS - Useful dimensions : 400 x 450 x 600 [mm] - Volume of the heating chamber : 96 [dm3] - Max. load : 250 [kg] - Max. temperature : 1400 [°C] - Max. operating temperature : 260 - 1350 [°C] - Maximum convection heating temperature : 750 [°C] Ljdoy T Sngspfx Akusrl - Heating time from 50°C to 1250°C : 60 [min] - Chamber cooling time from 1200°C to 200°C : 2 [min] PUMP UNIT - Mechanical primary pump : Drystar GV160 * Pumping speed : 160 [m3/h] * Power : 7.5 [kW] - Roots-type pump : Edwards EH1200 * Pumping speed : 500 [m3/h] * Power : 3 [kW] - Diffusion pump : Edwards HT16B * Pumping speed : 6.500 [l/s] * Power : 9 [kW] GAS - Cooling gas : Argon or Nitrogen - Power : 90 [kW] Water - Min. / max. pressure (inlet) : 2.5 / 3.0 [bars] - Min. / max. pressure (outlet) : 0 / 0.5 - Flow rate for heat exchanger during cooling phase : 400 [lpm] - Furnace chamber flow rate : 200 [lpm] - Max. inlet temperature : 30 [°C] - Max. inlet temperature (DP) : 25 [°C] POWER SUPPLY - Supply voltage : 400 [V] - Total installed power : 120 [kVA] WEIGHT & DIMENSIONS - Machine floor space : 4.682 x 4.356 [mm] - Machine height : 3.242 [mm] - Machine weight : 5000 [kg] EQUIPMENT - CNC : Siemens S7

Condition: excellent (used), max. temperature 1200 Grad size of opening 220 x 120 mm depth of chamber 400 mm Lodsxcbldjpfx Akuerl dimensions of the machine ca. 1,4 x 1,2 x 1,6 m

Condition: new, Four-shaft shredder in very good condition with only 1200 operating hours. Ledpsy T Hbusfx Akuerl Year of manufacture: 1998 2 x 7.5 kW motors.

Year of construction: 1989, condition: used, max. temperature 1000 Grad size of opening 170 x 90 mm depth of chamber 280 mm total power requirement 3 kW weight of the machine ca. 80 kg Lrsdpfx Aetqqptekujl dimensions 0,7 x 0,55 x 0,72 m

Condition: ready for operation (used), L & Z Lathe WEILER Condor -Guideways: "Good" condition -Optional 3-axis digital display -Center height 165mm -Swinging diameter over bed 330mm -Distance between centers 800mm -Speed range 28-2800 rpm -Automatic longitudinal/cross feeds -Spindle bore approx. 40mm -Threading capabilities / Metric / Inch, etc. -Collets / Quick-change tool holder incl. 30 x collets -Three-jaw chuck -Multifix with inserts -Chip guard -Machine feet -Drill chuck / Follower point -Emergency stop / On/Off -Documentation Ledpjy Tb Nasfx Akusrl Dimensions: L x W x H 2 x 0.8 x 1.6 meters / Weight 850 kg Errors and omissions excepted.

Condition: refurbished (used), Year of construction: 2019, operating hours: 5,225 h, overall weight: 25,000 kg, Doppstadt DW 3060 Biopower Type F - Year of manufacture: 2019 - Operating hours: 5,225 - Engine: MTU R61300 with 490 HP - AD BLUE - Weight: 25,000 kg - Remote control - Humidification system - Rear conveyor 5.5 m - Overband magnet - Hydraulic drive (self-propelled) Lredpfx Aoyxkwqekuel - Central lubrication Machine is overhauled and immediately available.

Condition: used, Year of construction: 1999, operating hours: 1,200 h, filling opening width: 1,000 mm, filling opening length: 1,250 mm, No. 04531 Four-shaft shredder WEIMA ZM 30 Used, year of construction 1999, approx. 1200 operating hours, machine in very good condition The four-shaft shredder is designed for bulky and very long wood waste, such as boards, pallets, packaging materials and cardboard of all kinds. Various plastics can also be shredded with this machine. The wood chips produced can be used directly for heating. Special secondary crushers excessively long chips. Hopper opening 1250 x 1000 mm LW Cutting unit width 462 mm Cutting unit length 562 mm Cutting disc diameter 235 mm Speed approx. 25 rpm 2 motors, each 7.5 kW Throughput capacity between 350 - 1250 kilograms per hour (depending on material and screen hole diameter) Fuse protection 50 / 63 A Extraction connection diameter 200 mm GS-tested, CE-compliant The cutting tools can be sharpened using an angle grinder and round grinder (see operating manual). The entire cutting unit can be replaced. Incl. technical documentation Incl. electrical connection cable with plug Transport dimensions approx. 1450 x 1250 x 2150 mm LWH Weight approx. 1300 kg To avoid any misunderstandings, an on-site inspection by prior appointment is possible and recommended Sold as is Technical specifications, condition description, year of construction and scope of delivery according to manufacturer’s brochure or previous owner, without guarantee Subject to prior sale For used machines, any warranty is excluded, the following applies: “sold as seen” Payment terms: Prices plus VAT, payment before collection or dispatch Delivery terms: Ex warehouse Lodpoy Tpg Tsfx Akuerl

Condition: good (used), Wood shredder for sale Prepared for conveyor belt removal Ideal for shredding wood residues (all types of softwood) and pallets Includes hydraulic pusher Motor: 7.5 kW Ledpfsxbyx Tox Akusrl Rotor width: approx. 82 cm Weight: 1,460 kilograms Full load current: 32 amp Main fuse: 35 amp

Condition: excellent (used), Catalog number 7805 TECHNICAL DATA - Track width: 340 mm - Roller width: 340 mm - Disc arbor diameter: 80 mm - Installed discs on upper shaft: 350 mm - Installed discs on lower shaft: 300 mm - Max cutting height: 200 mm - Min length of processed material: 700 mm – From above - 2 rows of kickback fingers - Smooth, slip, pressure shaft - Kickback fingers - 2 smooth, slip, pressure shafts - Saw shaft - 3 smooth pressure rollers – From below - Track conveyor - Saw shaft - Track conveyor - Infinitely variable feed speed adjustment Lrjdpfx Aksy At Rhsujl - Main motors: 2 x approx. 55 kW - Feed motor: 3 kW - Electric up/down elevation of the main body - Manual adjustment of saw shafts - Central lubrication - Extraction port diameter: 2 x 200 mm - Dimensions (L/W/H): 2700 x 1800 x 2150 mm - Weight: approx. 5,000 kg ADVANTAGES – German-made – Double-shaft design – 2 x 55 kW motors – Used multi-blade saw, in very good condition Net price: 178,900 PLN Net price: 42,590 EUR (at 4.2 EUR exchange rate) (Prices subject to change with significant rate fluctuations)

Condition: reconditioned (used), Year of construction: 2017, machine/vehicle number: SN48357, functionality: fully functional, Chamber furnace with exhaust hood, fully refurbished, 12-month warranty, available for immediate delivery - Max. temperature: 1300 °C - Internal dimensions (W x D x H): 400 x 400 x 400 mm - Capacity: 60 liters - Separate main switch - 5-sided heating - Supply and exhaust air with electrically actuated dampers (driven by Belimo actuators) - Supply air fan with frequency converter, controlled via regulator - Stainless steel exhaust hood - Bentrup 507 control system with thyristor control - Note: Controller language is German only; switching to other languages is not possible! - Additional drag element Type S for external recording - Documentation included - Net weight: 250 kg Lrsdpfx Ajtbq Eqokuol - Power consumption: 18 kW - Current rating: 26 amperes - Supply voltage: 3/N/PE 400VAC - Connection type: prepared for fixed connection, 32 A plug - Documentation, CE declaration - Electrically tested and supplied with current DGUV test protocol Inspection by appointment. Furnace, furnaces, annealing furnace, industrial furnace, chamber furnace, kiln, curing furnace, tempering furnace, laboratory furnace, hardening furnace, ceramic furnace

Condition: excellent (used), CATALOG NUMBER 7904 Technical data: - Max cutting height: 160mm - Max element width: 700mm - Working width of the shaft with saws: 600mm - Shaft diameter: 70mm - Max saw blade diameter: 450mm - Top: - Pawls - 2 geared feed rollers - Pressure with metal slip roller - Bottom: - Slip roller - Pawls - Geared feed roller - Shaft with saws - Smooth feed roller - Metal slip roller - Infinitely variable feed speed control - Feed motor: 1.5kW - Main motor: 55kW - Overall dimensions L/W/H: 1700x1400x1900mm - Weight: approx. 2740kg ADVANTAGES – Made in Poland Lsdpfxjy S Ab Ij Akujrl – Robust construction – Used machine, in very good condition Net price: 56,900 PLN Net price: 13,550 EUR Net price calculated at an exchange rate of 4.2 PLN/EUR (in case of larger exchange rate fluctuations, the price may change)

Year of construction: 2015, condition: new, Vertical furnace Lodpfxscdi D De Akusrl height: 1100mm useable diameter: 790mm outside diameter: 1560 mm outer height (without lid): 1480mm outer height (with lid): 2300mm electrically heated: 40 kW circulating fan: 2,2 kW three-phase supply: 400 V, 50 Hz temperature: max. 750°C

Condition: new, Saw shaft and saw bush Tool shaft and clamping bush Lredpfxonladho Akujl

Condition: excellent (used), Multiple-shaft circular saw (gang saw) by FOD BYDGOSZCZ* DPPA III 50E 620/120 Catalogue Number: 7407 TECHNICAL SPECIFICATIONS: - Maximum cutting height: 120 mm - Maximum workpiece width: 700 mm - Working width of the shaft with saw blades: 620 mm - Maximum saw blade diameter: 450 mm - Saw blade bore diameter: 90 mm Upper side: - Kickback pawls - 2 toothed driven rollers Ljdpfx Aey Sn Tcokujrl Lower side: - Kickback pawls - 2 smooth driven rollers - Saw blade shaft - Smooth driven roller - 2 feed speed options - Feed motor: 4.4 kW - Main motor: 30 kW - Machine dimensions (LxWxH): 2370x1400x1800 mm - Weight: approx. 3000 kg – Polish production – Used machine, very good condition Net price: 38,900 PLN Net price: 9,260 EUR (based on an exchange rate of 4.2 EUR) (Prices may change depending on currency fluctuations) * MAR-MASZ guarantees the quality of your purchase but is not an authorized dealer for the manufacturer. All trademarks and names are used purely for informational purposes to identify the product. We only resell goods that have previously been placed on the market by the manufacturer. We have no business association with the manufacturer.

Condition: used, Year of construction: 2011, max. temperature 1280 Grad size of opening 350 x 250 mm depth of chamber 500 mm volume 41 L voltage 400 V total power requirement 15,0 kW weight of the machine ca. 277 kg Ljdpfxoy R Efgo Akusrl dimensions of the machine ca. 1,15 x 1,45 x 1,35 m - Serial-No.: 219660 - control: NABERTHERM B300 - with swivel table 340 x 550 mm

Year of construction: 2025, condition: new, Curing ovens shown in the photos can vary in price depending on size, configuration, and optional features. 💡📏⚙️ At ROMER, we manufacture both standard models and fully bespoke solutions, tailored to your process requirements. 🏭✅ Tell us your part size, line capacity, curing profile, and available space - and we will propose the best setup and the options that actually improve daily performance. 🔥🎯 🧠📡 Control and monitoring Live process control for temperature, time, airflow, and modes - with alarms and saved recipes for repeatable cycles. 🔁✅ 🔥🧩 Heating module Fast heat-up and stable temperature thanks to efficient heating elements and quick energy transfer. ⚡🌡️ 🌀💨 Air circulation Uniform airflow reduces temperature differences for consistent coating quality. 🎯✅ 🧱❄️ Insulation and design Smart chamber construction minimizes heat loss - faster reaching setpoint, lower consumption. ♻️📉 🛡️⚠️ Safety and certification Sensors, interlocks, and protection logic increase safety and reliability. 🔒👷 ⚡💰 High efficiency Optimized heat transfer and reduced losses mean real operating savings. 📉🔥 ⏰🤖 Automatic start Programmable schedule - automatic preheating before the shift for smoother production starts. ⏱️✅ 🚪🔒 Self-latching doors + intelligent chimney Prevents accidental opening, chimney activates only when needed for safer operation. 🧯✅ 🌿🔋 ECO mode Low-energy standby when idle - fuel consumption reduction up to 20% (depending on process). 🌱📉 👀💡 View and lighting Inspection without opening the door - fewer temperature drops, easier supervision. ✨👁️ 🛤️🔥 Guide rails + automatic hood Heat hood runs only during loading to reduce temperature loss, automatic rail infeed improves ergonomics and loading speed. 🙌⚙️ 🎛️🌡️ MULTI-ZONE HEAT Independent zone control for uniform curing of parts with different mass and geometry. 🧩✅ 🧠♨️ MTS system Lodofx Nfmepfx Akuerl Heating elements mounted without thermal bridges - higher efficiency and faster time to set temperature. ⚡⏱️ 2-in-1 🧱↔️🧱 Split chamber Movable partition for two independent zones - drying and curing in one unit for maximum flexibility. 🚀🔁 🎚️🌀 VFD ventilation Variable fan speed based on chamber conditions - better control and lower electricity use. ⚙️💡

Year of construction: 2026, condition: new, Curing ovens shown in the photos can vary in price depending on size, configuration, and optional features. 💡📏⚙️ At ROMER, we manufacture both standard models and fully bespoke solutions, tailored to your process requirements. 🏭✅ Tell us your part size, line capacity, curing profile, and available space - and we will propose the best setup and the options that actually improve daily performance. 🔥🎯 🧠📡 Control and monitoring Live process control for temperature, time, airflow, and modes - with alarms and saved recipes for repeatable cycles. 🔁✅ 🔥🧩 Heating module Fast heat-up and stable temperature thanks to efficient heating elements and quick energy transfer. ⚡🌡️ 🌀💨 Air circulation Uniform airflow reduces temperature differences for consistent coating quality. 🎯✅ 🧱❄️ Insulation and design Smart chamber construction minimizes heat loss - faster reaching setpoint, lower consumption. ♻️📉 🛡️⚠️ Safety and certification Sensors, interlocks, and protection logic increase safety and reliability. 🔒👷 ⚡💰 High efficiency Optimized heat transfer and reduced losses mean real operating savings. 📉🔥 ⏰🤖 Automatic start Programmable schedule - automatic preheating before the shift for smoother production starts. ⏱️✅ 🚪🔒 Self-latching doors + intelligent chimney Prevents accidental opening, chimney activates only when needed for safer operation. 🧯✅ 🌿🔋 ECO mode Low-energy standby when idle - fuel consumption reduction up to 20% (depending on process). 🌱📉 👀💡 View and lighting Inspection without opening the door - fewer temperature drops, easier supervision. ✨👁️ 🛤️🔥 Guide rails + automatic hood Lsdpfx Aofy T H Ijkujrl Heat hood runs only during loading to reduce temperature loss, automatic rail infeed improves ergonomics and loading speed. 🙌⚙️ 🎛️🌡️ MULTI-ZONE HEAT Independent zone control for uniform curing of parts with different mass and geometry. 🧩✅ 🧠♨️ MTS system Heating elements mounted without thermal bridges - higher efficiency and faster time to set temperature. ⚡⏱️ 2-in-1 🧱↔️🧱 Split chamber Movable partition for two independent zones - drying and curing in one unit for maximum flexibility. 🚀🔁 🎚️🌀 VFD ventilation Variable fan speed based on chamber conditions - better control and lower electricity use. ⚙️💡

Year of construction: 2020, condition: new, 7 "Touch Panel The large color touch panel looks aesthetically and is comfortable and intuitive to use. You will set all important parameters on it. Memory of 20 programs with 10 events It is possible to save up to 20 programs and activate up to 10 consecutive time-temperature events arranged in the heating curve. This is especially needed for more demanding processes. Information on gas / oil consumption The consumption is calculated based on the burner settings. This feature will allow you to estimate the cost of a given cycle, plan consumption and check personnel. Dual-channel recorder of USB cycle parameters Each furnace is equipped with a recorder that records all firing parameters, including two temperature channels - like in an airplane black box, on a USB flash drive. The system also enables the analysis of monthly / daily statements, including media consumption and performance. Each start of heating, opening the door, can be recreated, a few years back. Such a dedicated option is not offered by any manufacturer. It is a system developed from scratch by our programmers Automatic smoke exhaust chimney The chimney can be programmed to open a few minutes before the end of the firing in order to smoke the chamber. It can be remotely controlled from the panel, it does not need to be done mechanically as in most structures. Minute forecast until the end The cycle has started, how long will it end? calculating the heating dynamics, we will count it and show on the display how much longer it will take. To open it, just pull the door. The lock has adjustable pressure of the door, to close it just push it, the lock will catch the door and automatically pull it back. Lrodpefz U Tqsfx Akusl In order to minimize the effect of heating the hall when opening the door, a hood is installed above the door to remove some of the heat to other places. The MTS system was created to provide a real reading of the temperature of the furnace chamber. Standard measurement is based on one temperature measurement which is often wrong.MTS is a system of many sensors located in the outermost places of the chamber. The multi-zone heating system ensures a firing quality that has been so far unique. Each normal oven has only one heating zone and only one temperature measurement! The multi zone heat system supports up to 8 independent heating zones in one oven. Each heating zone has as many as 3 temperature sensors! When there are temperature differences between zones, they are automatically equalized! The system helps to combat the problem when elements of different material thicknesses enter the furnace.