{"id":7597,"date":"2018-07-18T08:00:51","date_gmt":"2018-07-17T23:00:51","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=7597"},"modified":"2026-05-17T14:42:42","modified_gmt":"2026-05-17T05:42:42","slug":"wear-on-suspension-drilling-bits","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/suspension-drilling-bit-wear\/","title":{"rendered":"Bit Wear in Suspended Drilling Rigs | Consumables Management"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

The other day, we finished up at our current job site, so we're moving the equipment to the next one.<\/p>\n

This site involved the installation of 3.7-meter rebar, making excavation extremely difficult, and the borehole walls were unstable.<\/p>\n

It falls apart right away, so the slime doesn't come out.<\/p>\n

So, my personal best was 18 in a single day.<\/p>\n

One of our employees performed the operation a few days later.<\/p>\n

Since it was a difficult mountain to dig in, I had given him all sorts of advice the day before.<\/p>\n

The employees drank 12 bottles just in the morning...<\/p>\n

Since we had finished the rest by 3:00 p.m., I\u2019d say we must have drilled 25 to just under 30 holes, considering the extra time we had.<\/p>\n

I heard that the employee was better at it, but to be honest, I didn't expect the difference to be this big...<\/p>\n

I was actually pretty confident in my single-hole drilling, but I guess I just can't compete with pros who do it every day.<\/p>\n

Sorry for giving you so much advice!!<\/p>\n

\"I'm<\/p>\n

\n

But that's beside the point.<\/p>\n

Degree of bit wear<\/h3>\n

The bit's cutting edge flew off when it hit the main anchor pin on the mounting frame, but isn't this wear and tear pretty extreme?<\/p>\n

\"Hirado<\/p>\n

At this point, we actually can't achieve a bore diameter of \u03c665.<\/p>\n

The bit diameter of the single-hole drill is exactly 65 mm.<\/p>\n

That means if you use one site, it should be around 63 mm.<\/p>\n

If you need to measure the bit diameter during an inspection or similar situation, you\u2019ll need to have a brand-new one\u2014or one that\u2019s in near-new condition\u2014on hand.<\/p>\n

That said, if it\u2019s in a section with loose soil, the hole diameter might end up a bit larger due to machine vibration or air, lol (though I can\u2019t confirm that).<\/p>\n

\"Clay<\/p>\n

The chips are flying off nicely, aren't they...<\/p>\n

Actually, this clay bit isn't suitable for rock formations. It's not that it can't drill through them, but it doesn't perform very well.<\/p>\n

But in the clay club, I'm unbeatable.<\/p>\n

\"Clay<\/p>\n

The outside has also become thin. I can't believe this is the same thing.<\/p>\n

I get that the tip wears down little by little, but I didn't realize the shaft would wear down this much...<\/p>\n

When it cuts like this, it usually means there\u2019s a lot of sandy soil, and the cut looks like this.<\/p>\n

The power of sand is amazing, isn't it?<\/p>\n

 <\/p>\n

Since this clay bit broke on this job site,<\/p>\n

I used a standard cross bit of the back-blow and retract type.<\/p>\n

When the back is blocked, with a retractable type, it feels like it cuts through even a little bit, so I feel like I can get out of there faster lol.<\/p>\n

I always think it would be great if there were a tip on this part of the retrack too, so both sides could be filed down.<\/p>\n

I'd love to ask a manufacturer to develop a retraction bit with a chip, lol.<\/p>\n

 <\/p>\n

See you later.<\/p>\n

Types of Bits for Suspended Drilling Rigs<\/a><\/span><\/span><\/strong><\/span><\/h1>\n

Types of Bits for Suspended Drilling Rigs (Part 2)<\/a><\/span><\/span><\/strong><\/span><\/p>\n

\"Products I'm Glad I Used\" Series (Bit Edition)<\/span><\/span><\/strong><\/span><\/a><\/p>\n

 <\/p>\n

Hirado Metal Industries Co., Ltd., Yokohama Sales Office<\/strong><\/a><\/span><\/p>\n

*I just happen to buy them at the Yokohama Sales Office; there\u2019s no particular reason for it.<\/p>\n

And I don't get anything out of referring people, lol.<\/p>\n

Hirado Metal might be the only place that sells bits for clay.<\/span><\/strong><\/span>That's it.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. The other day, I finished up at my current job site, so I moved the equipment to the next one. This site involved inserting rebar into 3.7-meter-deep holes, which made digging extremely difficult\u2014the hole walls wouldn\u2019t stay upright on their own. They\u2019d collapse immediately, and the slurry wouldn\u2019t come out. So, my personal best was 18 holes in a single day\u2026<\/p>","protected":false},"author":2,"featured_media":5235,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[30],"tags":[46,116,205,409,1439],"class_list":["post-7597","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lock-bolt","tag-46","tag-116","tag-205","tag-409","tag-1439"],"acf":[],"yoast_head":"\n\u540a\u308a\u5f0f\u524a\u5b54\u6a5f\u7528\u306e\u30d3\u30c3\u30c8\u306e\u6469\u8017\uff5c\u6d88\u8017\u54c1\u7ba1\u7406 - \u65b0\u30a8\u30f3\u30bf\u306e\u6cd5\u9762\u7ba1\u7406\u587e<\/title>\n<meta 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