{"title":"Telescopic Gauges","description":"\u003ch2\u003eTelescopic Gauge (T-Gauge) Selection — Quick Reference\u003c\/h2\u003e\n\u003cp\u003eTelescopic gauges (T-gauges) = precision INTERNAL BORE measurement tools — for bores where caliper or micrometer measurement isn't practical (restricted access + deep holes + bores too small for vernier inside calipers). Use with outside micrometer to read.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGauge Range\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmall Bore Gauge Set (8-150mm)\u003c\/td\u003e\n\u003ctd\u003eStandard toolroom + engineering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSmall Hole Gauges (3-13mm)\u003c\/td\u003e\n\u003ctd\u003eVery small bores below T-gauge range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-Centering T-Gauge\u003c\/td\u003e\n\u003ctd\u003eLocks at maximum bore — operator removes + measures\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard T-Gauge\u003c\/td\u003e\n\u003ctd\u003eManual + careful operator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardened Steel Body\u003c\/td\u003e\n\u003ctd\u003eWorkshop standard — durable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsed with Outside Micrometer\u003c\/td\u003e\n\u003ctd\u003eTrue dimension requires micrometer reading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCritical:\u003c\/strong\u003e Telescopic gauge measures BORE — extract carefully + read with micrometer. Excessive tightness = wrong dimension; too loose = inaccurate. Repeat 3× to confirm. Better than indirect bore mics for small + restricted bores. For larger bores (\u0026gt;150mm) use bore gauge. Brands: \u003ca href=\"\/en-nz\/collections\/shop-by-brand\"\u003eMitutoyo\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/maxigear\"\u003eMaxigear\u003c\/a\u003e. Companion: \u003ca href=\"\/en-nz\/collections\/measuring-tools\"\u003emeasuring tools\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/micrometers\"\u003emicrometers\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/bore-gauges\"\u003ebore gauges\u003c\/a\u003e, \u003ca href=\"\/en-nz\/blogs\/product-guides\/bore-gauge-types\"\u003ebore gauge guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eTelescopic Gauges for Australian Toolroom and Engineering Work\u003c\/h2\u003e\n\u003cp\u003eTelescopic gauges (also called telescoping gauges or T-gauges) are precision measurement tools for internal bore diameters where direct caliper or micrometer measurement isn't practical — typically restricted-access bores, deep holes, or bores too small for vernier inside calipers. The spring-loaded telescoping plungers expand to fit the bore, lock at the diameter, and the dimension is then read using a micrometer on the gauge body. For Australian toolroom, machining, and engineering work requiring accurate internal bore measurement, telescopic gauges are essential. AIMS Industrial supplies telescopic gauges in the size ranges Australian trade and industrial customers need.\u003c\/p\u003e\n\n\u003ch3\u003eHow telescopic gauges work\u003c\/h3\u003e\n\u003cp\u003eThe gauge has two telescoping arms with hardened plungers at the ends. The arms are spring-loaded outward and lockable via a screw on the gauge handle. To measure a bore: insert the gauge with the arms partially compressed, release the lock to let the spring expand the arms against the bore wall, lock the gauge, and withdraw it from the bore. The gauge now holds the bore diameter between the plunger tips. Measure across the plunger tips with a micrometer to read the actual dimension.\u003c\/p\u003e\n\n\u003ch3\u003eWhere telescopic gauges earn their place\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine cylinder bore measurement\u003c\/strong\u003e — internal cylinder dimensions for engine reconditioning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing bore measurement\u003c\/strong\u003e — verifying housing bores for bearing fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTooling bore inspection\u003c\/strong\u003e — measuring fixture and tool bores\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep bore measurement\u003c\/strong\u003e — bores deeper than vernier inside calipers can reach\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestricted-access measurement\u003c\/strong\u003e — bores in housings where normal calipers can't fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduction inspection\u003c\/strong\u003e — verifying machined bore dimensions on production parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSizing — match to bore range\u003c\/h3\u003e\n\u003cp\u003eTelescopic gauges are typically supplied in sets covering ranges. Common configurations:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-13mm range\u003c\/strong\u003e — for small bore work\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e13-32mm range\u003c\/strong\u003e — general workshop bore measurement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e32-54mm range\u003c\/strong\u003e — larger bore work\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSets covering 8-150mm\u003c\/strong\u003e — comprehensive toolroom kits in hard cases\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMatch the gauge size to the bore being measured — gauges that don't fully expand to the bore size won't measure accurately, and oversized gauges won't enter the bore.\u003c\/p\u003e\n\n\u003ch3\u003eMeasurement practice\u003c\/h3\u003e\n\u003cp\u003ePosition the gauge perpendicular to the bore axis (a slight angle gives a false-large reading). Compress the arms slightly to enter the bore. Position at the measurement plane, release the lock, allow the spring to expand the arms against the bore wall, then lock the gauge. Slowly rock the gauge through the perpendicular plane while withdrawing — this confirms the gauge has located at the true diameter rather than a chordal dimension. Withdraw without disturbing the lock. Measure across the plunger tips with a micrometer; the micrometer reading is the bore diameter.\u003c\/p\u003e\n\n\u003ch3\u003eAccuracy considerations\u003c\/h3\u003e\n\u003cp\u003eTelescopic gauges are transfer measurement tools — they hold the dimension to be measured by a separate micrometer. Accuracy depends on three things: the gauge's plunger tip accuracy and dimensional stability, the operator's technique in locating the gauge correctly, and the micrometer's accuracy. Quality gauges have hardened plunger tips that maintain dimension across years of use; cheap gauges have softer tips that wear and produce drifting measurements.\u003c\/p\u003e\n\n\u003ch3\u003eBrands stocked at AIMS\u003c\/h3\u003e\n\u003cp\u003eTelescopic gauges are stocked from quality manufacturers including Mitutoyo for precision toolroom use. For specific brand or accuracy class requirements, sourcing through our distribution channels covers most options.\u003c\/p\u003e\n\n\u003ch3\u003eCare and accuracy\u003c\/h3\u003e\n\u003cp\u003eStore telescopic gauges in their case to protect plunger tips. Keep clean and lightly oiled to prevent rust on the plunger surfaces. Inspect plunger tips before use — damaged or worn tips give inaccurate readings. For traceable inspection workplaces, periodic calibration may be required as part of the broader measuring tool calibration regime.\u003c\/p\u003e\n\n\u003ch3\u003eCompanion ranges at AIMS\u003c\/h3\u003e\n\u003cp\u003eTelescopic gauges sit alongside our broader measuring tool range — see \u003ca href=\"\/en-nz\/collections\/measuring-tools\"\u003emeasuring tools\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/radius-gauges\"\u003eradius gauges\u003c\/a\u003e, \u003ca href=\"\/en-nz\/collections\/protractors\"\u003eprotractors\u003c\/a\u003e, and \u003ca href=\"\/en-nz\/collections\/screw-pitch-gauges\"\u003escrew pitch gauges\u003c\/a\u003e for the related products.\u003c\/p\u003e\n\n\u003cp\u003eNeed help speccing telescopic gauges for specific bore measurement work? \u003ca href=\"\/en-nz\/pages\/contact-us\"\u003econtact our team\u003c\/a\u003e — we'll match by size range and accuracy class.\u003c\/p\u003e","products":[{"product_id":"maxigear-telescopic-gauge-8mm-150mm-6-pieces","title":"Maxigear Telescopic Gauge 8mm - 150mm, 6 Pieces","description":"\u003cdiv style=\"max-width:680px;width:100%;padding:12px 0;font-family:Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex;align-items:flex-start;justify-content:space-between;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 0;margin-bottom:24px;\"\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e◆\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003e8mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eMaxigear\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e▲\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eTrade workshop pick\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:14px;line-height:1.6;color:#444;margin:0;\"\u003eThe Maxigear Telescopic Gauge 8mm - 150mm, 6 Pieces gives trades and workshops a dependable, fit-for-purpose hand tool. For quick inside measurement \u0026amp; determination of inside diameters\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Maxigear","offers":[{"title":"Default Title","offer_id":49296653025557,"sku":"A0145247","price":82.92,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/5191\/1957\/files\/maxigear-telescopic-gauge-8mm-150mm-6-pieces-9414444.jpg?v=1781511190"},{"product_id":"maxigear-telescopic-gauge-8mm-152mm-300m-long-reach","title":"Maxigear Telescopic Gauge 8mm - 152mm, 300m Long Reach","description":"\u003cdiv style=\"max-width:680px;width:100%;padding:12px 0;font-family:Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex;align-items:flex-start;justify-content:space-between;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 0;margin-bottom:24px;\"\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e◆\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003e8mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eMaxigear\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e▲\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eTrade workshop pick\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:14px;line-height:1.6;color:#444;margin:0;\"\u003eThe Maxigear Telescopic Gauge 8mm - 152mm, 300m Long Reach gives trades and workshops a dependable, fit-for-purpose hand tool. For quick inside measurement \u0026amp; determination of inside diameters\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Maxigear","offers":[{"title":"Default Title","offer_id":49296654369045,"sku":"A0145248","price":141.31,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/5191\/1957\/files\/maxigear-telescopic-gauge-8mm-152mm-300m-long-reach-3703414.jpg?v=1781511190"},{"product_id":"telescoping-gauge-set-series-155","title":"Mitutoyo Telescoping Gauge Set (Series 155)","description":"\u003cdiv style=\"max-width:680px;width:100%;padding:12px 0;font-family:Arial,sans-serif;\"\u003e\n\u003cdiv style=\"display:flex;align-items:flex-start;justify-content:space-between;border-top:1px solid #e0e0e0;border-bottom:1px solid #e0e0e0;padding:16px 0;margin-bottom:24px;\"\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e◆\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eTransfers bore and groove dimensions\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eHardened, precisely ground contacts\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;padding:0 12px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:24px;color:#333;margin-bottom:6px;line-height:1;\"\u003e▲\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;font-weight:500;color:#333;line-height:1.4;\"\u003eSpring-loaded, self-centring and locking\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:14px;line-height:1.6;color:#444;margin:0;\"\u003eThe Mitutoyo Telescoping Gauge Set Series 155 captures the diameter of bores and the width of narrow grooves for transfer to an outside micrometer. Spring-loaded, self-centring contacts lock in place for accurate, repeatable readings. A practical telescoping gauge set, with expert support and fast Australia-wide supply.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mitutoyo","offers":[{"title":"Default Title","offer_id":50005455765781,"sku":"A0211343","price":524.59,"currency_code":"AUD","in_stock":true},{"title":"8 - 12.7mm","offer_id":50005455798549,"sku":"A0211344","price":74.84,"currency_code":"AUD","in_stock":true},{"title":"12.7 - 19mm","offer_id":50005455831317,"sku":"A0211345","price":84.09,"currency_code":"AUD","in_stock":true},{"title":"19 - 32mm","offer_id":50005455864085,"sku":"A0211346","price":90.74,"currency_code":"AUD","in_stock":true},{"title":"32 - 54mm","offer_id":50005455896853,"sku":"A0211347","price":101.51,"currency_code":"AUD","in_stock":true},{"title":"54 - 90mm","offer_id":50005455929621,"sku":"A0211348","price":110.38,"currency_code":"AUD","in_stock":true},{"title":"90 - 150mm","offer_id":50005455962389,"sku":"A0211349","price":155.75,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0740\/5191\/1957\/files\/A0211343_telescoping-gauge-set-series-155_947bc934-7add-4691-9184-493fdb0464cf.webp?v=1782890001"}],"url":"https:\/\/aimsindustrial.com.au\/en-nz\/collections\/telescopic-gauges.oembed","provider":"AIMS Industrial Supplies","version":"1.0","type":"link"}