Precision Ball Screw (TP/TS/TL Series)

Specifications

How to choose Ball screw

Points to check when selecting, with the values for this product (Precision Ball Screw (TP/TS/TL Series)).

1. 1. Determine lead from required speed and resolution

   This product: Lead ℓ 1～40 mm

   Lead is the linear travel per shaft revolution. Listed products range from 1 to 40 mm. A larger lead allows faster feed at the same rotational speed but increases required torque and makes the travel per pulse coarser. Calculate it backward from maximum speed, maximum motor rotational speed, and positioning resolution.

2. 2. Select shaft outer diameter from load and rigidity

   This product: Screw shaft outer diameter d 8～32 mm

   Shaft outer diameter affects load capacity, rigidity, buckling load, and critical speed. Listed products range from 8 to 32 mm. For long overall lengths or high-speed rotation, a thicker shaft is required to avoid deflection and resonance. Check the permissible rotational speed including the support method.

3. 3. Verify life using basic dynamic load rating

   The basic dynamic load rating Ca is the axial load used as the reference for life calculation. Listed products range from 1950 to 16100 N. Calculate the rated life from the average operating load and travel distance, and confirm it meets the required service years. Life is approximately inversely proportional to the cube of the load ratio.

4. 4. Check shock loads against static load rating

   The basic static load rating C0a is the axial load permissible at standstill or under impact. Listed products range from 2600 to 33400 N. Confirm that a sufficient static safety factor is secured against maximum loads such as inertial forces during sudden stops and machining reaction forces.

5. 5. Select accuracy grade matching positioning accuracy

   The accuracy grade indicates the permissible lead error range; a smaller number means higher accuracy. Listed examples are mainly C5 with ground finish. Choosing a grade beyond what is required raises cost, so determine it by comparing with the required positioning accuracy.

6. 6. Balance backlash and preload torque

   This product: Axial clearance 0～0.030 or less mm

   Axial clearance for listed products is 0 to 0.03 mm. For applications where backlash (play on reversal) is undesirable in reciprocating motion, select preloaded types. However, a higher preload torque (2 to 25 N·cm for listed products) increases drive torque and heat generation, so verify it against motor capacity.

7. 7. Match overall length and shaft end machining to the equipment

   This product: Overall length 85～1025 mm

   Overall length for listed products ranges from 85 to 2500 mm. Determine it by adding nut length and clearance to the stroke, including the mounting section for the support bearings. Long shafts face stricter constraints from critical speed and buckling, so consider them together with shaft outer diameter.

This guide was written by AI based on the listed products' documents and specification items.

About Ball screw and all products

Description

Adopts a Gothic arch groove, allowing a small axial clearance, and high rigidity is obtained through preload even with a single nut. Accuracy grades are controlled at C0 to C7 and Ct10. Shaft outer diameter 8 to 32 mm, lead 2 to 40 mm, and total length up to 1025 mm can be manufactured. Materials include AISI 4150H, SCM415H, and SUS440C.

FAQ

Q. What ranges can the screw shaft outer diameter, lead, and total length be manufactured within for the Precision Ball Screw (TP/TS/TL Series)?

A. The shaft outer diameter can be 8 to 32 mm, the lead 2 to 40 mm, and the total length up to 1025 mm.

Q. Does the nut of the Precision Ball Screw (TP/TS/TL Series) provide high rigidity even when used as a single nut?

A. It adopts a Gothic arch groove, and preload provides high rigidity even with a single nut.

Q. How are the accuracy grade and axial clearance controlled for the Precision Ball Screw (TP/TS/TL Series)?

A. Accuracy grades are controlled at C0 to C7 and Ct10. Axial clearance is 0 to 0.030 mm or less. The series are TP (C3), TS (C5), and TL (Ct7).

Q. What are the materials and screw shaft hardness of the Precision Ball Screw (TP/TS/TL Series)?

A. Materials include AISI 4150H, SCM415H, and SUS440C. The screw shaft hardness is HRC 59±3.

Q. What applications is the Precision Ball Screw (TP/TS/TL Series) suited for?

A. It is suited for positioning and conveyance applications. Grinding and integrated in-house production achieve high accuracy and reliability, and it offers low friction and high transmission efficiency.

Written by AI based on the content of the source documents.

Source documents

• Catalog 精密ボールねじ 技術資料・標準在庫品カタログ 67 pages