Description: Features: brand new and high quality The three packages are only the belt perimeter and the synchronous wheel model is different. All the others are the same. Please choose on demand. The main spindle parameters are as follows: Overall height of axle seat: 74mm(2.91in) Shaft for seat bore: 22mm(0.87in) Axis teeth: M5 internal teeth Saw blade clamp: one side is a saw with 16 inner holes, and the other is a saw blade with 20 inner holes The main shaft is: M10 There are two kinds of belts: a 180mm perimeter and a 234mm perimeter Bearings: F6900 flanges, with borders Install saw blades not more than 110mm in diameter 1. Main parameters of 2GT160MM saw spindle: The large synchronous wheel is 2GT(30 teeth), the inner hole of 30 teeth is 10mm(0.39in). The small synchronous wheel is 16 teeth, the inner hole is 5mm(0.20in) The belt is 2GT 160mm(6.30in) perimeter. 2. Main parameters of SM180MM saw spindle: The large synchronous wheel is S3M(30 teeth), the inner hole of 30 teeth is 10mm(0.39in). The small synchronous wheel is 15 teeth, the inner hole is 5mm(0.20in). The belt is S3M 180mm(7.09in) perimeter. 3. Main parameters of SM234MM saw spindle: The large synchronous wheel is S3M(30 teeth), the inner hole of 30 teeth is 10mm(0.39in). The small synchronous wheel is 15 teeth, the inner hole is 5mm(0.20in). The belt is S3M 234mm(9.21in) perimeter. Specification: Optional Model: 1# 2GT160, 2# SM180, 3# SM234 Material: Metal Alloy Dimensions: As pictures shown.(approx) Color: Silver Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x DIY Woodworking Tools Set(other accessories demo in the picture is not included.)