Boring Bars with Holder
Product Code : LSK-MMTM-10601
Boring Bars with Holder (SKU LSK-MMTM-10601) is a lathe boring set: a double-ended, one-piece bar that carries a small square tool bit to enlarge and finish holes, clamped in a square-shank holder for the tool post. Turner and Machinist trainees in ITIs, polytechnic workshops and TVET institutes use it for internal turning. Science Lab Supplies provides the set from Ambala, India, supplying training institutes, colleges, tender contractors and distributors in seven sizes.
Specifications
Each bar has square tool-bit ends at 90° and 45°, so one bar can bore straight through or reach into a blind hole or shoulder. The finish is shiny black, and the seven sizes below run from a 3/8 in bar with a 1/8 in bit up to a 1-3/16 in bar with a 1/2 in bit.
| Parameter | Value |
|---|---|
| SKU | LSK-MMTM-10601 |
| Bar type | Double-ended, one piece, 90° and 45° square ends |
| Item 1 | Bar 3/8 in dia × 4-1/2 in; holder 2-1/4 in long, 1/2 in sq; bit 1/8 in sq |
| Item 2 | Bar 7/16 in × 5-1/4 in; holder 2-1/2 in, 1/2 in sq; bit 3/16 in |
| Item 3 | Bar 9/16 in × 6-3/4 in; holder 3 in, 5/8 in sq; bit 1/4 in |
| Item 4 | Bar 3/4 in × 9-1/4 in; holder 3-3/4 in, 7/8 in sq; bit 5/16 in |
| Item 5 | Bar 7/8 in × 11-1/2 in; holder 4-1/2 in, 1-1/4 in sq; bit 3/8 in |
| Item 6 | Bar 1-1/8 in × 12-3/4 in; holder 4-1/2 in, 1-3/8 in sq; bit 7/16 in |
| Item 7 | Bar 1-3/16 in × 13-3/4 in; holder 5 in, 1-5/8 in sq; bit 1/2 in |
| Finish | Shiny black |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for Boring Bars with Holder
Boring is how trainees produce accurate, concentric bores that a drill alone cannot give. Using the bar teaches tool overhang, rigidity and light finishing cuts, and the set is a standard entry among workshop tools for technical training institutes and ITI trade tools lists.
- ITI Turner and Machinist trades: through boring, counterboring and internal steps.
- Using the 45° end to reach into blind holes and against internal shoulders.
- Diploma and B.Tech workshop practice: finishing drilled holes to size.
Use the stiffest bar the hole allows and keep overhang short to limit chatter; work under instructor supervision.
Standard Scope of Supply
Each set is supplied with the boring bar, its holder, an Allen key and a clamping screw. Tool bits are not included; order square bits separately in the size listed for your item number.
Packing, MOQ and Lead Time
Sets can be quoted in one size or as a range from item 1 to item 7 for a whole machine shop. Packing, delivery time and price are shown on the quotation for each item and quantity, and matching tool bits can be added.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Peru, Egypt, Iraq, Nigeria, Kenya and Ghana. Send the item numbers through the contact page or the enquiry cart; for public procurement, the lab tender page explains how we quote.
Frequently Asked Questions
Are tool bits included with the boring bars?
No. Each set comes with an Allen key and screw but without tool bits. The square bit size for each item is listed in the table.
Why does the bar have two ends?
One end holds the bit at 90° for straight boring; the other holds it at 45° for reaching into blind holes and facing internal shoulders.
Who supplies these boring bars?
Science Lab Supplies supplies them from Ambala, India, and can group them with lathes and other tool holders on a single quotation.
Related Lathe Tooling
Boring is taught with other lathe operations on the same jobs. These four items from the same range make up a lathe tooling kit and can share one quotation with the boring bars.
- Center Lathe Machine — the machine the bars mount on.
- Knurling Tool Holder — external finishing after boring.
- Threading Tool Holder — screw cutting practice.
- Parting Tool Holder — parting off the finished part.
Browse the full Metal Manufacturing Training Machine range or all TVET lab equipment.
Last updated: 25 September 2026
