Specification Brand : TMP1105 BulletPoint1 : Packing list: 3pcs 1mod 12x12x1000mm rack, 3pcs 1mod 17teeth / 20teeth gear BulletPoint2 : Width: 12mm; Thickness: 12mm; Length: 1000mm; Net Weight: 1.1KG BulletPoint3 : Materail: 45# steel; Shape: Rack; Location: External gear; Shape: straight teeth BulletPoint4 : Tooth surface hardness: not hardened, if you need hardened, it need add usd 4/meter. BulletPoint5 : This can be used in Grinding Machine, CNC Machine. Color : 20 Teeth ExternallyAssignedProductIdentifier : 8306070471859 ItemName : TMP1105 3pcs 1 Mod 12x12x1000mm CNC Rack + 3pcs 1mod 17teeth / 20teeth Pinion CNC Rack (Hole Diameter : 6mm, Number of Teeth : 20 Teeth) ItemPackageQuantity : 1 ItemTypeKeyword : rack-and-pinion-gears Manufacturer : 唐铭鲆544162-US Material : Metal NumberOfItems : 1 PartNumber : 唐铭鲆544162-US ProductDescription : Features: 45 steel quenched hardness and smoothness, attention this product is not quenched, "Modulus" is the ratio of two teeth adjacent to the same side of the teeth between the tooth profile and the pitch t of the pi π m (modulus) = t (pitch) / π (3.14) Tip diameter D = number of teeth Z +2 * modulus M Gear pitch = 4.71 * modulus M Gear depth =3.375 * modulus M ProductSiteLaunchDate : 2021-09-10T05:31:42.198Z Size : 6mm UnitCount : 1 UnspscCode : 26111500