YCM JT18 Flashcards
(40 cards)
What are the X, Y, and Z axis travels of the JT18?
The X-axis is 70.87”, Y-axis is 33.86”, and Z-axis is 29.53”, making it suitable for machining large parts with high precision.
What unique design feature ensures the table is fully supported in the JT18?
The T-base, overhang-free design keeps the table fully supported regardless of axis position, ensuring accuracy and flatness across large parts.
What is the maximum table load capacity of the JT18?
The table can handle up to 4,409 lbs, making it ideal for heavy-duty machining applications.
What material is the bed of the JT18 constructed from?
The bed is made from Meehanite cast iron, offering excellent rigidity and vibration damping for demanding machining operations.
What type of guideways are used in the JT18’s axes?
The JT18 uses rigid square box ways with Turcite B, ensuring high rigidity, reduced vibration, and long-lasting wear resistance.
How do pre-tensioned ballscrews improve machine performance?
Pre-tensioned ballscrews minimize thermal growth and enhance rigidity, stability, and precision during machining operations.
What is the positioning accuracy of the JT18 on all axes?
The positioning accuracy is 0.00055” (X/Y/Z), ensuring precise movements for machining applications.
What is the repeatability of the JT18 on all axes?
The repeatability is ±0.00039” (X/Y/Z), providing consistent accuracy in repeated operations.
What are the rapid traverse rates for the JT18’s axes?
The rapid traverse rates are 591 ipm for the X and Y axes, and 472 ipm for the Z axis, reducing non-cutting time.
What are the cutting feed rates for the JT18?
The cutting feed rates are 196.9 ipm for all axes, ensuring smooth and efficient machining.
What is the ballscrew pitch for the JT18?
The ballscrew pitch is 0.393”, allowing for precise and smooth axis movement.
What spindle interface is used in the JT18?
The JT18 uses a Big Plus CAT50 spindle interface, which offers enhanced rigidity and precision.
What is the spindle speed range of the JT18?
The spindle speed ranges from 100 to 6,000 RPM, suitable for both roughing and finishing operations.
What is the maximum horsepower of the JT18’s spindle motor?
The spindle motor provides a maximum of 33 HP (21 kW) for 30 minutes, with a continuous rating of 20 HP (15 kW).
What is the torque rating of the JT18 spindle motor?
The spindle delivers 347.48 ft-lbs at 30 minutes and 281.73 ft-lbs at continuous rating, allowing machining of tough materials.
What spindle cooling technology does the JT18 utilize?
The JT18 uses a chiller unit for spindle jacket cooling, maintaining thermal stability during extended operations.
What are the table dimensions of the JT18?
The table measures 78.74” x 33.86”, providing ample space for large workpieces.
What is the height of the table from the floor?
The table height from the floor is 38.58”, ensuring ergonomic access for operators.
What is the maximum workpiece size the JT18 can accommodate?
The JT18 supports workpieces up to 78.74” in length, 33.86” in width, and 29.53” in height.
What is the configuration of the table’s T-slots?
The table features 5 T-slots, each 0.866” wide and spaced 5.905” apart, accommodating various work-holding setups.
What is the standard tool capacity of the JT18’s ATC?
The ATC holds 40 tools, ensuring flexibility for complex machining operations.
What is the maximum tool diameter with adjacent pockets empty?
The maximum tool diameter is 9.44” when adjacent pockets are empty.
What is the maximum tool length and weight the ATC can handle?
The ATC accommodates tools up to 13.77” in length and 44 lbs in weight.
What is the tool-to-tool change time for the JT18’s ATC?
The tool-to-tool change time is 5 seconds, improving operational efficiency.
